Electron configuration

Question 1

What is the electron configuration

Answer 1

Electron configuration describes how electrons are distributed in its atomic orbitals
They follow a standard notation in which all electron-containing atomic subshells are placed in a sequence

For example, the electron configuration of sodium is 1s22s22p63s1

Question 2

Atomic structure of a atom

Answer 2

The atom is formed by protons, neutrons and electrons.
The nucleus is formed by protons, and neutrons
The electrons flow arround the nucleus in shells called energy levels

Question 3

True or False: Electrons occupy the lowest energy orbitals first.

Answer 3

True

Question 4

What are the four types of orbitals?

Answer 4

s, p, d, and f

Question 5

What is the maximum number of electrons that can occupy an ‘s’ orbital?

Answer 5

2

Question 6

True or False: The maximum number of electrons in a p subshell is 6.

Answer 6

True

Question 7

In the electron configuration 1s² 2s² 2p⁶, how many total electrons are present?

Answer 7

10

Question 8

What principle explains the arrangement of electrons in orbitals with the lowest energy first?

Answer 8

Aufbau Principle

Question 9

Fill in the blank: The maximum number of electrons in a d subshell is ______.

Answer 9

10

Question 10

True or False: Electrons are always found in a fixed position around the nucleus.

Answer 10

False

Question 11

What is meant by ‘valence electrons’?

Answer 11

Electrons in the outermost shell that are involved in chemical bonding.

Question 12

What is the electron configuration for the element with atomic number 26?

Answer 12

[Ar] 4s² 3d⁶

Question 13

What is the significance of the electron configuration in determining the chemical properties of an element?

Answer 13

It helps predict how an element will react chemically.