Electron Configuration and Atomic Structure

The video tutorial explains how to determine the element corresponding to the electron configuration 1s2 2s2 2p6 3s2 3p6. It presents two methods: counting the total number of electrons to find the atomic number, which identifies the element as argon, and using the periodic table's orbital blocks to locate the element. The tutorial concludes by confirming that the configuration belongs to argon.

What is the electron configuration given in the problem statement?

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2 3p4

• 1s2 2s2 2p6 3s2 3p5

• 1s2 2s2 2p6 3s2 3p3

How many total electrons are present in the given configuration?

• 16

• 20

• 18

• 22

Which method can be used to identify an element from its electron configuration?

• Counting neutrons

• Counting electrons

• Counting protons

• Counting atomic mass

What is the significance of the atomic number in identifying an element?

• It represents the number of protons and neutrons.

• It represents the number of electrons only.

• It represents the number of protons.

• It represents the number of neutrons.

What is the relationship between electrons and protons in a neutral atom?

• Electrons are unrelated to protons.

• Electrons are half the protons.

• Electrons are double the protons.

• Electrons equal protons.

Which block on the periodic table can hold up to 10 electrons?

• f block

• p block

• d block

• s block

How many electrons can the p block hold?

• 6

• 8

• 4

• 2

Which orbital block does the configuration 3p6 belong to?

• f block

• p block

• s block

• d block

What is the element with atomic number 18?

• Helium

• Krypton

• Argon

• Neon