Valence Electrons and Atomic Structure

This video tutorial explains the concept of core and valence electrons, focusing on their roles in chemical bonding. It details how to identify valence electrons in elements from the s, p, d, and f blocks of the periodic table. The tutorial provides examples to illustrate the process of determining the number of valence and core electrons in various elements, emphasizing the relationship between an element's position in the periodic table and its electron configuration.

What is the primary role of valence electrons in an atom?

• They are responsible for the atom's color.

• They are located in the nucleus.

• They are involved in chemical bonding.

• They determine the atom's mass.

If an element has 9 total electrons and 7 valence electrons, how many core electrons does it have?

• 16

• 2

• 7

• 9

How many core electrons does iodine have if it has 53 total electrons and 7 valence electrons?

• 60

• 53

• 46

• 7

How can you determine the number of valence electrons for an element in the s or p block?

• By measuring the atomic radius.

• By counting the column number in the periodic table.

• By counting the number of neutrons.

• By counting the number of protons.

What is the relationship between elements in the same column of the periodic table?

• They have the same atomic mass.

• They have the same number of protons.

• They have the same number of valence electrons.

• They have the same atomic radius.

Which electrons are considered valence in the d block?

• The lowest energy electrons.

• Only the d electrons.

• The highest s and n-1 d electrons.

• Only the s electrons.

How many valence electrons does zirconium have?

• 8

• 4

• 6

• 2

In the f block, which orbitals are considered when counting valence electrons?

• Only the s orbitals.

• The highest s, d, and f orbitals.

• The lowest energy orbitals.

• Only the f orbitals.

How many valence electrons does samarium have?

• 8

• 7

• 6

• 9

Which element has 10 valence electrons in the d block?

• Zirconium

• Platinum

• Ruthenium

• Lead