Electronic Configuration of Elements Quiz

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What is the electronic configuration of Lithium (Li)?

2, 1

What are valence electrons?

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

How is valence related to the combining capacity of an atom?

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

What is the valency of an element?

The valency of an element is the number of atoms of hydrogen with which one atom of the element can combine. Signup and view all the answers

What determines the chemical activity of an element?

The number of valence electrons in the outermost shell of an atom determines its chemical activity. Signup and view all the answers

How are electronic configurations of elements represented?

Electronic configurations are represented by writing the distribution of electrons in different energy levels or shells. Signup and view all the answers

Explain the Bohr's model of the atom briefly.

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

Define valency and how is it correlated with the electronic configuration of an atom?

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). Signup and view all the answers

How many shells are occupied in the nitrogen (atomic number = 7) atom?

Two shells are occupied in the nitrogen atom. Signup and view all the answers

Name the element which has completely filled first shell.

Helium has a completely filled first shell. Signup and view all the answers

What is the maximum number of electrons that can be accommodated in the first shell of an atom?

The first shell can accommodate a maximum of 2 electrons. Signup and view all the answers

Write the electronic configuration of an element having atomic number equal to 11.

The electronic configuration of an element with atomic number 11 is 2, 8, 1. Signup and view all the answers

Describe isotopes and isobars.

Isotopes are atoms of the same element with different numbers of neutrons. Isobars are atoms of different elements with the same mass number. Signup and view all the answers

What are the rules for filling electrons in different shells up to atomic number 20?

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

What is the maximum number of electrons that can be accommodated in the third shell?

The maximum number of electrons that can be accommodated in the third shell is 18. Signup and view all the answers

How would you define atomic number and mass number of an atom?

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

How many electrons are present in the M shell of an element with atomic number 16?

In the M shell of an element with atomic number 16, there are 10 electrons. Signup and view all the answers

What is the electronic configuration of an element with atomic number 9?

The electronic configuration of an element with atomic number 9 is 2, 7. Signup and view all the answers