Electrons Unit Test

Identify the element with the following electron configuration: 1s² 2s²2p².

• Be

• Si

• C

• F

All electromagnetic waves have the same in a vacuum.

• frequency

• energy

• wavelength

• speed

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.

1. 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

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

Cations have ___________ electrons and thus have a _____________ charge.

• lost; negative

• gained; negative

• lost; positive

• gained positive

Identify the element with the following electron configuration: [Ar]4s²3d¹⁰4p³.

• K

• N

• Ge

• As

1. The energy required to remove one electron from a neutral atom of an element is known as _____________ __________________.

• electronegativity

• ionization energy

• reactivity

• quantum energy