Ch. 2 Chem Review for BIO

Front

What are atoms with unstable nuclei called?

Back

Radioactive

Front

How many protons does the element with atomic number 15 have?

Back

15

Front

Why do atoms share electrons in covalent bonds?

Back

To achieve noble-gas electron notation

Front

True or False: Neutrons have a negative charge.

Back

False

Front

What is a solvent?

Back

The substance that does the dissolving in a solution.

Front

What is the charge of protons?

Back

Positive

Front

What is the charge of electrons?

Back

Negative

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an ionic bond and a covalent bond?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus and do not have a charge.