Unit 3 Electrons Test Review

All electromagnetic waves have the same_________ in a vacuum. 

• wavelength

• frequency
  

• energy

• speed

Tags

NGSS.HS-PS4-1

Identify the element with the following electron configuration: 1s²2s²2p⁶3s²3p²

• Be

• Si

• C

• F

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The electron cloud has all of the following characteristics EXCEPT 

• it is negatively charged

• it is divided into energy levels.

• contains nearly all of the atom’s mass. 

• 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.

Identify the total amount of electrons in an element with this electron configuration: 1s²2s²2p⁶3s²

• 3

• 5

• 12

• 15

Tags

NGSS.HS-PS1-1

Identify the total amount of valence electrons in an element with this electron configuration: 1s²2s²2p⁶3s²

• 2

• 5

• 12

• 15

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Identify the total amount of energy levels in an element with this electron configuration: 1s²2s²2p⁶3s²

• 1

• 2

• 3

• 4

Tags

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

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