Biochemistry Review

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RNA

Which identifies the number of protons in an atom's nucleus?

• Electron Cloud

• Atomic Theory

• Atomic Number

• Mass Number

What is a positive ion called?

• anion

• cation

• isotope

• covalent

What is a negative ion called?

• anion

• cation

• covalent

• isotope

An atom becomes _________ when it gains electrons.

• Positive

• Negative

• Neutral

An atom becomes _______ when it loses electrons.

• Positive

• Negative

• Neutral

How do covalent bonds form?

• by sharing electrons between atoms

• by donating or receiving electrons

How are ionic bonds formed?

• transfer of electrons

• sharing of electrons