The compound that is represented by different ratios of the elements, then the compound is known as having variable composition. Generally, the transition elements form compounds with variable composition.
- 1 What substances have a variable composition?
- 2 Do pure substances have a variable composition?
- 3 Does a compound have the same composition?
- 4 Does a solution have variable composition?
- 5 Does a compound have a fixed composition?
- 6 Can compounds have different properties than their elements?
- 7 Is composition an element or compound?
- 8 What is it called when a compound has the same composition throughout?
- 9 What are the characteristics of elements and compounds?
- 10 Is compound a pure substance?
- 11 Are compounds substances?
- 12 Can ah * * * * * * * * * * mixture have variable composition justify giving an example?
- 13 How elements and compounds are classified as pure substances?
- 14 Can a substance vary in composition?
- 15 Can the composition of a pure substance vary?
- 16 How do compounds differ from elements?
- 17 Which of these substances is a compound?
- 18 Do compounds have characteristic physical properties?
- 19 Which among the substances are compounds?
- 20 Do compounds have variable melting points?
- 21 How can compounds be made of the same element but have different properties?
- 22 What is the composition of element?
- 23 What word describes different compounds which are found together but not combined chemically?
- 24 What has matter with a composition that is always the same?
- 25 Is a substance a mixture with the same composition throughout?
- 26 What are the properties of compounds?
- 27 Is compound a mixture?
- 28 Why compound is called a pure substance?
- 29 Are compounds made up of molecules?
- 30 What is the characteristic of compounds?
- 31 What characteristics define a compound?
- 32 Does a compound have one type of atom?
- 33 How do you classify from compounds?
- 34 Are compounds homogeneous?
- 35 Is a compound considered a pure substance Why or why not quizlet?
- 36 Why is air a mixture but not a compound?
- 37 Do homogeneous mixtures have compositions that vary?
- 38 When can the composition of a mixture vary?
- 39 Are substances composed of two or more elements?
- 40 Which is matter that can vary in composition?
- 41 Which mixture can you not distinguish the components?
- 42 Can a compound vary in its composition like mixtures do?
- 43 How do the properties of a compound compare to the properties of the elements it contains?
- 44 Is molecule and compound same?
- 45 Which of the following properties do not describe a compound?
- 46 Which of the following substance is not a compound?
- 47 What are the characteristics of elements and compounds?
- 48 How will you know if a substance is a compound?
- 49 How did you know that these are elements and compound?
- 50 Does compounds have fixed composition?
- 51 What is a variable composition?
- 52 Does elements and compounds have fixed melting points?
- 53 Do compounds have the same properties as their constituent elements?
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54
How does compound differ from an element?
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54.1
Related Posts
- 54.1.1 Do all equations have variables?
- 54.1.2 Do compounds have compositions that vary?
- 54.1.3 Do control variables have to be significant?
- 54.1.4 Do all organic compounds contain nitrogen?
- 54.1.5 Do compounds have properties similar to those of their component elements?
- 54.1.6 Do compounds only contain one type of atom?
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54.1
Related Posts
What substances have a variable composition?
A mixture is a substance with a variable composition, meaning that it is composed of molecules or atoms of differing types. These may have intermolecular bonds, or bonds between molecules, but such bonds are not nearly as strong as those formed when elements bond to form a compound.
Do pure substances have a variable composition?
A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample.
Does a compound have the same composition?
A compound always has the same elements in the same proportions. For example, carbon dioxide always has two atoms of oxygen for each atom of carbon, and water always has two atoms of hydrogen for each atom of oxygen. A compound always has the same composition throughout.
Does a solution have variable composition?
Solutions belong to the category of substances identified as mixtures, substances with variable composition. This may seem a bit confusing, since among the defining characteristics of a solution are its uniformity and consistency.
Does a compound have a fixed composition?
A compound that results from a chemical reaction always has a unique and fixed chemical composition. The substances in the compound can be separated from one another only by another chemical reaction.
Can compounds have different properties than their elements?
Compound. A compound is a pure substance whose smallest unit is made up of atoms of two or more elements joined by chemical bonds. Compounds have different properties than the individual elements that make up the compound. Compounds can only be separated by chemical means.
Is composition an element or compound?
Element | |
---|---|
Definition | An element is a pure chemical substance made of same type of atom. |
Composition | Elements contain only one type of atom. Each atom has the same atomic number i.e., the same number of protons in their nucleus. |
What is it called when a compound has the same composition throughout?
A compound has the same composition throughout which is called pure substance.
What are the characteristics of elements and compounds?
Elements | Compounds |
---|---|
They have properties different from compounds they make. Example – Hydrogen & oxygen are combustible, but water is not. | They have properties different from elements that they are made of. Example – Hydrogen and Oxygen are gases, but they make up water which is liquid. |
Is compound a pure substance?
In a scientific context, “pure” denotes a single type of material. Ostensibly, compounds contain more than one type of material. Yet both compounds and elements are considered pure substances. Pure compounds are created when elements combine permanently, forming one substance.
Are compounds substances?
All compounds are substances, but not all substances are compounds. A chemical compound can be either atoms bonded together in molecules or crystals in which atoms, molecules or ions form a crystalline lattice.
Can ah * * * * * * * * * * mixture have variable composition justify giving an example?
Yes, homogenous mixture have a variable composition as the constituents are present in any ratio such as 1:2 or 1:3 etc.
How elements and compounds are classified as pure substances?
There is no physical change that can separate elements into more than one kind of substance. This makes an element a pure substance. Compounds are made of only one kind of molecule. The molecule is made up of two or more kinds of atoms.
Can a substance vary in composition?
Whereas pure substances have fixed compositions, the compositions of mixtures can vary. A cup of sweetened coffee, for example, can contain either a little sugar or a lot. The substances making up a mixture (such as sugar and water) are called components of the mixture.
Can the composition of a pure substance vary?
A pure substance has a definite and constant composition — like salt or sugar. A pure substance can be either an element or a compound, but the composition of a pure substance doesn’t vary.
How do compounds differ from elements?
An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.
Which of these substances is a compound?
The correct option is d. Salt. Salt is a compound as it is formed by sodium cations and chloride anions.
Do compounds have characteristic physical properties?
Compounds have physical and chemical properties that help us identify them. A physical property is a characteristic that can be observed or measured. In this lesson, we looked at some of the more common physical properties of compounds, including color, odor, melting point and boiling point.
Which among the substances are compounds?
Water, which is a chemical compound of hydrogen and oxygen in the ratio two hydrogen atoms for every oxygen atom, contains H2O molecules. Sodium chloride is a chemical compound formed from sodium (Na) and chlorine (Cl) in a 1:1 ratio.
Do compounds have variable melting points?
Variable melting points, non-uniform composition and variable properties are properties of mixtures. Hence, the correct option is the option (D). Note: There are two types of pure substances, elements and compounds. Elements have atoms of only one type.
How can compounds be made of the same element but have different properties?
If the same elements combine in different ratios, they form different compounds. Types of compounds include covalent and ionic compounds. They differ in the nature of the bonds that hold their atoms or ions together.
What is the composition of element?
The chemical composition of a pure substance corresponds to the relative amounts of the elements that constitute the substance itself. It can be expressed with a chemical formula, such as an empirical or molecular formula.
What word describes different compounds which are found together but not combined chemically?
A mixture contains two or more different substances that are not chemically joined together. The different substances in a mixture can be elements and/or compounds. dome7w and 3 more users found this answer helpful.
What has matter with a composition that is always the same?
A pure substance is a form of matter that has a constant composition (meaning it’s the same everywhere) and properties that are constant throughout the sample (meaning there is only one set of properties such as melting point, color, boiling point, etc. throughout the matter).
Is a substance a mixture with the same composition throughout?
A mixture is a combination of two or more substances in any proportions. The substances in a mixture do not combine chemically, so they retain their physical properties. A homogeneous mixture has the same composition throughout. A heterogeneous mixture varies in its composition.
What are the properties of compounds?
Properties of Compounds
It is composed of two elements: hydrogen, an extremely flammable gas, and oxygen, a gas that supports combustion. A compound differs from a mixture in that the components of a mixture retain their own properties and may be present in many different proportions.
Is compound a mixture?
No. Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.
Why compound is called a pure substance?
Pure substances are defined as substances that are made of only one type of atoms or molecules. A compound is a pure substance composed of two or more different atoms chemically bonded to one another. A compound can be destroyed by chemical means.
Are compounds made up of molecules?
All compounds are molecules, but not all molecules are compounds. That is because a molecule can be made up of two atoms of the same kind, as when two oxygen atoms bind together to make an oxygen molecule. However, all compounds are made up of two or more different types of atoms.
What is the characteristic of compounds?
Characteristics of a compound
The properties of a compound are different from the properties of its constituents. Formation of a compound is generally accompanied by evolution of energy in the form of heat or light. A compound has a fixed melting point and boiling point. A compound is always homogeneous in nature.
What characteristics define a compound?
- Components in a compound are present in a definite proportion.
- It has a homogeneous composition.
- Particles in a compound are of one kind.
- A compound is made up of one or more atoms of the same or different elements.
- In a compound the elements are present in a fixed ratio by mass.
Does a compound have one type of atom?
Explanation: By definition a compound is composed of two or more different elements chemically bonded, which is same as saying more than one kind of atom.
How do you classify from compounds?
Chemical compounds may be classified according to several different criteria. One common method is based on the specific elements present. For example, oxides contain one or more oxygen atoms, hydrides contain one or more hydrogen atoms, and halides contain one or more halogen (Group 17) atoms.
Are compounds homogeneous?
Compounds are pure substances the are composed of two or more elements chemically bonded. Compounds have a definite composition, so they are the same throughout, which makes them homogeneous.
Is a compound considered a pure substance Why or why not quizlet?
Can a compound be considered a pure substance? Yes because a compound is ONLY made up of particle of itself.
Why is air a mixture but not a compound?
Air is a mixture, but not a compound because air can be separated into different components such oxygen, nitrogen etc through the process of fractional distillation. Also, air shows all the properties of gases present in it.
Do homogeneous mixtures have compositions that vary?
Most matter is a mixture: It is composed of two or more types of matter that can be present in varying amounts and can be separated by physical means. Heterogeneous mixtures vary in composition from point to point; homogeneous mixtures have the same composition from point to point.
When can the composition of a mixture vary?
The properties of a mixture can vary, because the composition of a mixture is not fixed. If amount one of substance in mixture is changed, the properties such system is also changed.
Are substances composed of two or more elements?
Compound : A substance made of two or more elements that are chemically combined in fixed amounts.
Which is matter that can vary in composition?
A mixture is matter that can vary in composition. Mixtures are combinations of two or more substances that are physically blended together.
Which mixture can you not distinguish the components?
In homogeneous mixtures, you can not distinguish each component with the naked eye. They have a uniform composition. For example sea water, air , and vinegar. Steel is a homogeneous mixture, however it is made from iron and carbon.
Can a compound vary in its composition like mixtures do?
A compound is composed of two or more elements in a fixed ratio, so you cannot vary the amount of each element in a compound.
How do the properties of a compound compare to the properties of the elements it contains?
The properties of compounds are different from the properties of the elements that form them—sometimes very different. That’s because elements in a compound combine and become an entirely different substance with its own unique properties.
Is molecule and compound same?
A molecule is formed when two or more atoms of an element chemically join together. And a compound is a type of molecule, in which the types of atoms forming the molecule are different from each other.
Which of the following properties do not describe a compound?
The property that does not describe a compound is- (d) It is mixed in any proportion by mass. A compound is a pure substance that is made up of two or more elements. The elements that form a compound are combined in a definite proportion by mass and are distributed uniformly.
Which of the following substance is not a compound?
Answer: (ozone) consists of only one kind of atom oxygen. The structure formed by only one type of atom is called a molecule not compound.
What are the characteristics of elements and compounds?
Elements | Compounds |
---|---|
They have properties different from compounds they make. Example – Hydrogen & oxygen are combustible, but water is not. | They have properties different from elements that they are made of. Example – Hydrogen and Oxygen are gases, but they make up water which is liquid. |
How will you know if a substance is a compound?
A substance that can be broken down into chemically simpler components (because it has more than one element) is a compound. For example, water is a compound composed of the elements hydrogen and oxygen.
How did you know that these are elements and compound?
Explanation: An element is a pure substance and is found on the periodic table. If you have more than one element chemically bonded, it is a compound. Hydrogen, oxygen, and iron are all elements.
Does compounds have fixed composition?
The composition of a compound is fixed, the constituents are present in fixed proportion by mass. A compound has definite formula.
What is a variable composition?
A mixture is a substance with a variable composition, meaning that it is composed of molecules or atoms of differing types. These may have intermolecular bonds, or bonds between molecules, but such bonds are not nearly as strong as those formed when elements bond to form a compound.
Does elements and compounds have fixed melting points?
Explanation: The compounds are formed where atoms of two or more elements combine in a fixed ratio to each other. The compounds have a fixed melting and boiling point.
Do compounds have the same properties as their constituent elements?
1 Answer. Compounds have NEITHER the same chemical properties NOR the same physical properties as their constituent elements.
How does compound differ from an element?
An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.