Electron structure

Question 1

What does the principal quantum number indicate

Answer 1

The shell occupied by the electrons

Question 2

What is a shell

Answer 2

A group of orbitals with the same principal quantum number

Question 3

How many electrons can the 1st shell hold

Answer 3

2

Question 4

How many electrons can the second shell hold

Answer 4

8

Question 5

How many electrons can the third shell hold

Answer 5

18

Question 6

How many electrons can the 4th shell hold

Answer 6

32

Question 7

What is an orbital

Answer 7

A region around the nucleus that can hold up two electrons with opposite spins

Question 8

How many electrons can an orbital hold

Answer 8

2

Question 9

What are the 4 types of orbitals

Answer 9

s
p
d
f

Question 10

What is the shape of a s-orbital

Answer 10

Spherical

Question 11

What is the shape of a p-orbital

Answer 11

Dum-bell shape

Question 12

How many orbitals are found in a S subshell

Answer 12

1

Question 13

How many electrons can be held in a S subshell

Answer 13

2

Question 14

How many orbitals does a P subshell have

Answer 14

3

Question 15

How many electrons can be held in a P subshell

Answer 15

6

Question 16

How many orbitals are present in a D subshell

Answer 16

5

Question 17

How many electrons can be held in a d-sub shell

Answer 17

10

Question 18

What are the rules by which electrons are arranged in shells

Answer 18

1)Electrons are added at one time
2) Lowest available energy level is filled first
3) Each energy level must be filled before the next one can fill
4) Each orbital is filled singly before paring
5) 4s is filled before 3d

Question 19

Why does 4s orbital fill before 3d

Answer 19

$s orbital has lower energy that 3d before its filled

Question 20

Which electrons are lost when an atom becomes a positive ion

Answer 20

Electrons in the highest energy levels