Decomposition is the opposite of a _____ reaction.
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Buildings that contain radon in their structures can cause i…
Buildings that contain radon in their structures can cause illness because radon will _____.
An electrically charged small negative particle which encirc…
An electrically charged small negative particle which encircles a nucleus is the _____.
What is the term for a substance that can increase the rate…
What is the term for a substance that can increase the rate of a reaction without becoming changed?
What does a radioactive element do?
What does a radioactive element do?
When sodium reacts with chloride usually a covalent bond is…
When sodium reacts with chloride usually a covalent bond is formed.
When atoms of different elements combine they form _____.
When atoms of different elements combine they form _____.
People are constantly exposed to what is termed background r…
People are constantly exposed to what is termed background radiation in the environment.
When atoms react chemically they gain, lose, or share _____.
When atoms react chemically they gain, lose, or share _____.
The nucleus of an atom always has a _____ charge.
The nucleus of an atom always has a _____ charge.