Pre-Assessment Chemical Bonding

An ionic bond forms when atoms ___________ electrons.

• gain
• share
• increase
• transfer

If an atom loses two electrons what charge will it have?

• + 2
•  - 2
• +1
• -1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If an atom gains one electron what charge will it have?

• -2
• -1
• +1

Tags

NGSS.HS-PS1-1

Covalent compounds

• Share electrons
• transfer electrons
• contain a sea of electrons
• conduct electricity

Tags

NGSS.HS-PS1-2

What is the number of valence electrons for Oxygen?

• 8
• 6
• 2
• 1

Tags

NGSS.HS-PS1-1

How many valence electrons in this structure?

• 6
• 5
• 4
• 7

Tags

NGSS.HS-PS1-1

A bond that forms when electrons are transferred is called a/an

• ionic bond
• covalent bond
• hydrogen bond

When electrons are shared unequally a/an ___________ bond is formed 

• ionic 
• hydrogen
• polar covalent 

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

Tags

NGSS.HS-PS1-2

1. Are the atoms more stable when they are bonded together or when they are apart?

• Bonded Together

• Apart

Tags

NGSS.HS-PS1-4