Molecules & Compounds Vocabulary Practice

A mixture whose composition is uniform throughout and cannot be easily identified or separated is called?

• Homogenous Mixture

• Heterogenous Mixture

Define polymer.

• A circular molecule made with many repeating units.

• A short molecule made of a few repeating units.

• A long, chain-like molecule made of repeating units.

• A chain-like molecule that contains hydrogen and oxygen.

What is an extended structure?

• An extended structure is a type of structure that is made of many smaller atoms in a chain.

• The types of elements that make up a substance, as well as the specific ratios of atoms of each kind of element that make it.

• An extended structure is a structure whose subunits occur in a constant ratio and are arranged in a repeating pattern; the subunit can be individual atoms (like Carbon) or a molecule (like propane or butane).

• A group of two or more atoms that are held together by chemical bonds.

What is the term for combining two or more atoms together?

• atoms

• elements

• molecules

• compounds

What is a compound?

• A compound is a substance that contains more than one type of atom.

• An atom with protons, neutrons, and electrons.

• A pure substance that contains only one type of atom.

• Part of an atom.

What is a crystal?

• A crystal is a solid, pure substance.

• A crystal has particles arranged in a specific, repeating order (molecular structure).

• A crystal is a substance in which the particles are arranged in an orderly, geometric, and repeating pattern.

• All of the above descriptions describe a crystal.

What is a pure substance?

• Two or more atoms joined together.

• A sample of matter with specific physical and chemical properties.

• An attractive force that holds atoms together.

• A substance.

What is a chemical bond?

• A pure substance made up of two or more different atoms.

• Two or more atoms.

• The attractive force that holds two or more atoms together.

• It is two Hydrogen atoms.

An element is a ___ that cannot be separated into simpler substances by physical or chemical means.

• pure substance

• mixture

• solution

• compound

A __ mixture is a mixture in which the composition is not uniform throughout the mixture.

• element

• homogeneous

• heterogeneous

• compound