UNIT 3 - Review

All electromagnetic waves have the same in a vacuum.

• Wavelength

• Frequency

• Energy

• Speed

Tags

NGSS.HS-PS4-1

• Be

• Si

• C

• F

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The electron cloud has all of the following characteristics EXCEPT

• It is negatively charged.

• Contains nearly all of the atom’s mass.

• It is divided into energy levels.

• Contains nearly all of the atom’s volume.

Which of the following statements about electron behavior is not true?

• Electrons closer to the nucleus have more energy than electrons further from the nucleus.

• Light can be emitted when an electron goes from an excited state to a ground state.

• Electrons are always in constant motion.

• Electrons need to absorb energy to move to an energy level away from the nucleus.

• 3

• 5

• 11

• 15

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NGSS.HS-PS1-1

• 3

• 5

• 11

• 15

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NGSS.HS-PS1-1

• 1

• 2

• 3

• 5

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NGSS.HS-PS1-1

Which of the following statements is true about anions?

• Typically nonmetals

• Typically metals

• Tend to share electrons

• Tend to have positive oxidation numbers

Tags

NGSS.HS-PS1-2

Two atoms have a difference in electronegativity of 2.34. What type of bond will they most likely form?

• Covalent

• Polar covalent

• Ionic

• They will not form a bond.

Two oxygen atoms have a difference in electronegativity of 0. What type of bond will they form?

• Covalent

• Polar covalent

• Ionic

• They will not form a bond.