AP Chem Unit 1 Review (Long)

Front

What atom matches this electron configuration? 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰

Back

Zinc

Front

Based on ionization energies, which element is most likely X? Options: Na, Mg, Al, Si

Back

Al

Front

How many valence electrons are in an atom with 13 protons, 14 neutrons, and 14 electrons arranged in 2:8:3?

Back

3 valence electrons

Front

Order the following elements by increasing atomic radius: Mg, P, Cl

Back

Cl < P < Mg

Front

Which arrow points to a neutron? Options: Arrow A, Arrow B, Arrow C, Arrow D

Back

Arrow B

Front

Define ionization energy.

Back

The energy required to remove an electron from an atom in the gas phase.

Front

What is the electron configuration for a neutral atom of Aluminum (Al)?

Back

1s² 2s² 2p⁶ 3s² 3p¹

Front

Explain the trend of atomic radius in the periodic table.

Back

Atomic radius generally decreases across a period and increases down a group.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine an atom's ability to bond with other atoms.

Front

Define atomic number.

Back

The number of protons in the nucleus of an atom, which determines the element's identity.