Electron Structure

Question 1

What is each shell given?

Answer 1

A principal quantum number

Question 2

How do you calculate the maximum number of electrons in a shell?

Answer 2

2n squared (n is the principal quantum number)

Question 3

How many electrons are in the first shell?

Answer 3

2

Question 4

How many electrons are in the second shell?

Answer 4

8

Question 5

How many electrons are in the third shell?

Answer 5

18

Question 6

How many electrons are in the fourth shell?

Answer 6

32

Question 7

What is the first ionisation energy?

Answer 7

The energy required to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions

Question 8

What is electron shielding?

Answer 8

The repulsion between electrons in different inner shells

Question 9

What is a shell?

Answer 9

A group of atomic orbitals with the same principal quantum number

Question 10

What is the principal quantum number?

Answer 10

A number representing the relative overall energy of each orbital which increases with distance from the nucleus

Question 11

What is an atomic orbital?

Answer 11

A region within an atom that can hold up to 2 electrons with opposite spins

Question 12

What is a sub-shell?

Answer 12

A group of the same type of atomic orbitals within a shell

Question 13

What is electronic configuration?

Answer 13

The arrangement of electrons in an atom