What is the term for a substance that can increase the rate of a reaction without becoming changed?
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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.
Why is iodine-131 used to assess thyroid function?
Why is iodine-131 used to assess thyroid function?
The _____ is the smallest particle of an element, which has…
The _____ is the smallest particle of an element, which has the properties of the element.
A solution with a pH of 7.35 is considered to be _____.
A solution with a pH of 7.35 is considered to be _____.