Chemistry Review Chapter

How many valence electrons does calcium have?

• 2
• 4
• 6
• 7

Tags

NGSS.HS-PS1-1

How many valence electrons does hydrogen have?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-1

When an atom loses an electron, it becomes a:

• positive ion
• negative ion
• neutral ion
• neutral atom

Which of the following is NOT a property of ionic compounds?

• They have very high melting points
• They conduct electricity when in solution
• They have high boiling points
• They are insoluble in water

Ionic compounds are formed when one or more valence electrons are transferred from _____

• a nonmetal atom to a metal atom
• a nonmetal atom to a nonmetal atom
• a metal atom to a nonmetal atom
• a metal atom to a metal atom

This is a correct dot diagram for neon (Ne)

• true
• false

Tags

NGSS.HS-PS1-1

This could be the dot diagram of

• Ne
• H
• C
• F

Tags

NGSS.HS-PS1-1

This is a correct dot diagram for oxygen (O)

• true
• false

Tags

NGSS.MS-PS1-1

How are covalent bonds explained?

• When one atom takes the other atom's electron
• When the atom shares an electron with an another atom
• When the two nucleus merge
• When the neutrons leave the nucleus

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases