Chemistry Final Exam Review 2

What is the correct Lewis Dot diagram for a molecule of Nitrogen trihydride (NH₃)?

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Tags

NGSS.MS-PS1-1

Which name represents the formula  $Fe_2O_3$  ?

• Iron (III) oxide

• Iron (II) oxide

Tags

NGSS.MS-PS1-1

Match the name and formula:

• iron (II) oxide, Fe₂O₃

• potassium chloride, K₂Cl₂

• carbon monoxide, CO₂

Tags

NGSS.MS-PS1-1

Which is the electron configuration of an atom of Period 2 element?

• 1s²2s¹

• 1s²2s²2p⁶3s¹

Tags

NGSS.HS-PS1-1

Which is the electron configuration of an atom of Period 3 element?

• 1s²2s¹

• 1s²2s²2p⁶3s¹

Tags

NGSS.HS-PS1-1

Alkali metals have...

• 1 valence electron, +1 charge

• 2 valence electrons, +2 charge

• 1 valence electrons, -1 charge

Tags

NGSS.MS-PS1-1

Decomposing of an apple is an example of...

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

Which one is the least reactive group?

• Alkali metal

• Alkali earth metal

• Halogens

• Noble Gases

Which of the following is the Lewis dot diagram for Bromine:

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Tags

NGSS.MS-PS1-1

Which answer is an example of a chemical change?

• Boiling water

• rusting iron

• dissolving powder

• freezing water

Tags

NGSS.MS-PS1-2