B.2.1 The Nature of Matter

What particles make up atoms?

• protons

• isotopes

• electrons

• neutrons

• rejectons

Smallest unit of matter that retains its unique properties:

• element

• compound

• isotope

• molecule

Created when two or more elements combine chemically in specific ratios:

• element

• compound

• isotope

• molecule

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When electrons are shared between nonmetals, _____ bonds form.

• ionic

• covalent

• hydrogen

• nuclear

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What happens during a chemical reaction?

• bonds between atoms may be broken

• new bonds between atoms may form

• new substances form

• new elements form

• atoms may be destroyed

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The particles in the nucleus of an atom:

• protons

• neutrons

• electrons

• molecules

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The smallest unit of a covalent compound:

• atom

• element

• molecule

• subatomic

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When electrons are transferred, __________ bonds form.

• covalent

• ionic

• hydrogen

• van der Waals

A charged atom:

• molecule

• isotope

• ion

• isomer

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Which are pure substances?

• elements

• mixtures

• solutions

• compounds

• light