Unit 2 Practice Test

Front

What is Electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Which element has a greater electronegativity: N or C?

Back

N (Nitrogen) has a greater electronegativity than C (Carbon).

Front

What does the Aufbau principle state?

Back

The Aufbau principle states that electrons occupy the lowest energy orbitals available to them before filling higher energy orbitals.

Front

What is the ground state electron configuration of Manganese (Mn)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

Why does Francium (Fr) have the lowest ionization energy in Group 1?

Back

Francium has the lowest ionization energy because its 1 valence electron is very far from the nucleus, requiring little energy to remove it.

Front

What is Hund's rule?

Back

Hund's rule states that electrons will fill degenerate orbitals singly before pairing up.

Front

What is the Pauli exclusion principle?

Back

The Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers.

Front

What is the significance of the atomic number?

Back

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

Front

What is a valence electron?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.