Unit 3 Electrons Test

All electromagnetic waves have the same ________________in a vacuum.

• wavelength

• frequency

• energy

• speed

Identify the element with the following electron configuration: 1s²2s²2p².

• Be

• Si

• C

• F

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.

Identify the total amount of electrons in an element with this electron configuration: 1s²2s²2p⁶3s²3p³.

• 3

• 5

• 11

• 15

Identify the number of valence electrons in an element with this electron configuration: 1s²2s²2p⁶3s²3p³.

• 3

• 5

• 11

• 15

Identify the number of energy levels in an element with this electron configuration: 1s²2s²2p⁶3s²3p³.

• 1

• 2

• 3

• 5

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.