Electronic Configuration of Elements Quiz

2, 1

Valence electrons are the electrons in the outermost shell of an atom.

Valence is the number of chemical bonds an atom can form with univalent atoms.

The valency of an element is the number of atoms of hydrogen with which one atom of the element can combine.

The number of valence electrons in the outermost shell of an atom determines its chemical activity.

Electronic configurations are represented by writing the distribution of electrons in different energy levels or shells.

In Bohr's model, electrons orbit the nucleus in fixed energy levels or shells at specific distances.

Valency is the combining capacity of an atom. It is determined by the number of electrons in the outermost shell of an atom (valence electrons).

Two shells are occupied in the nitrogen atom.

Helium has a completely filled first shell.

The first shell can accommodate a maximum of 2 electrons.

The electronic configuration of an element with atomic number 11 is 2, 8, 1.

Isotopes are atoms of the same element with different numbers of neutrons. Isobars are atoms of different elements with the same mass number.

Electrons fill lower energy levels before higher ones, following the Aufbau principle, Pauli exclusion principle, and Hund's rule.

The maximum number of electrons that can be accommodated in the third shell is 18.

Atomic number is the number of protons in an atom's nucleus. Mass number is the sum of protons and neutrons in the nucleus.

In the M shell of an element with atomic number 16, there are 10 electrons.

The electronic configuration of an element with atomic number 9 is 2, 7.