Electron Configuration and Orbital Filling

The video tutorial covers the basics of electron configuration, explaining the structure of atoms, including shells, subshells, and orbitals. It details how electrons are distributed in these shells and subshells, with a focus on the s, p, d, and f subshells. The tutorial provides examples of electron configurations for elements like fluorine, calcium, and magnesium, and emphasizes the importance of practice to master these concepts.

What are the subshells present in an atom's electron configuration?

• a) s, p, d, f

• b) a, b, c, d

• c) x, y, z

• d) m, n, o

How many orbitals are present in the p subshell?

• d) 7

• c) 5

• b) 3

• a) 1

What is the maximum number of electrons that the second shell can hold?

• d) 32

• b) 8

• c) 18

• a) 2

What is the electron configuration of fluorine?

• a) 1s2 2s2 2p5

• d) 1s2 2p5

• b) 1s2 2s2 2p6

• c) 1s2 2s1 2p6

In which order do electrons fill the orbitals in calcium?

• a) 1s, 2s, 2p, 3s, 3p, 4s, 3d

• b) 1s, 2s, 2p, 3s, 3p, 3d, 4s

• d) 1s, 2s, 2p, 3s, 3p, 3d

• c) 1s, 2s, 2p, 3s, 3p, 4s

What is the electron configuration of calcium?

• d) 1s2 2s2 2p6 3s2 3p6

• c) 1s2 2s2 2p6 3s2 3p6 3d1

• b) 1s2 2s2 2p6 3s2 3p6 3d2

• a) 1s2 2s2 2p6 3s2 3p6 4s2

Which subshell is filled first in calcium, 4s or 3d?

• d) Neither

• c) Both at the same time

• b) 4s

• a) 3d

What is the electron configuration of a magnesium ion (Mg2+)?

• d) 1s2 2s2 2p3

• a) 1s2 2s2 2p6

• b) 1s2 2s2 2p5

• c) 1s2 2s2 2p4

Which group of elements typically forms ions with a 2+ charge?

• d) Group 0

• c) Group 7

• b) Group 2

• a) Group 1

What is the electron configuration of neon?

• a) 1s2 2s2 2p6

• b) 1s2 2s2 2p5

• d) 1s2 2s2 2p3

• c) 1s2 2s2 2p4