10 Physical Chemistry Revision

How many electrons does Si contain?

• 14
• 28
• 2
• 4

• Periods
• Groups

What is the electron configuration of sodium?

• 2.8
• 2.8.2
• 2.8.1
• 11

• Periods
• Groups

• energy levels
• valence electrons
• protons
• neutrons

• Metals
• Nonmetals
• Metalloids

How many valence electrons does Beryllium have?

• 1

• 2

• 3

• 4

• 5

When an atom loses a valence electron, it becomes a(n) _____________ ion.

• positive

• negative

• neutral

How many valence electrons does Fluorine have?

• 4

• 5

• 6

• 7

• 8

Ionic bonds form between two ions that have

• negative charges

• positive charges

• opposite charges