Semester Review 3

A proton has a charge of

• +1

• 0
• -1
• -2

an electron has a charge of

• -1
• +1

• 0
• -10 eV

An atom has 8 protons, 8 neutrons and 10 electrons. What is the atomic number?

• 8
• 16
• 10
• -2

An atom has 11 protons, 12 neutrons and 10 electrons. What will the charge be?

• +1

• -1
• -2
• +2

Ionic bonds form between ___________________ and _______________.

• metals, metals
• nonmetals, nonmetals
• metals, nonmetals
• ions, metals

In an ionic bond, atoms will _________________________ or ____________________ electrons to become more stable.

• share, add
• gain, share
• lose, share
• gain, lose

An ____________________ is an atom or groups of atoms that has an electric charge.

• element
• ion
• atom
• electron shell

Electron Shells

• energy levels where electrons are located
• can contain up to 8 electrons
• a simplified representation of an atom
• neutral charge = Atomic Mass - Atomic Number

Hydrogen (H) has ___ valence electrons.

• 1
• 2
• 7
• 4

Oxygen (O) has ___ valence electrons.

• 6
• 5
• 2
• 1