Question

plz answer this question urgently...​

Answer 1

Answer:

Heya! here is ur answer.

1.Flourine -2nd period, 7 th A grp

2.Aluminium-3 rd period, 3rd A grp

3.Nitrogen-2nd period, 5 th A grp

4.Calcium-4 th period, 2nd A grp

5.Sulphur-3 rd period, 6 th A grp

6.Sodium-3rd period, 1 A grp

Hope it helps you..

Answer 2

Explanation:

To Find -

• Group, periods and name of the following elements.

Solution -

1)

1s² 2s² 2p^5

Atomic number = 2 + 2 + 5 = 9

Group = 17

Period = 2

Name = Flourine

Symbol = F

2)

1s² 2s² 2p⁶ 3s² 3p¹

Atomic number = 2 + 2 + 6 + 2 + 1 = 13

Group = 13

Period = 3

Name = Aluminium

Symbol = Al

3)

1s² 2s² 2p³

Atomic number = 2 + 2 + 3 = 7

Group = 15

Period = 2

Name = Nitrogen

Symbol = N

4)

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Atomic number = 2 + 2 + 6 + 2 + 6 + 2 = 20

Group = 2

Period = 4

Name = Calcium

Symbol = Ca

5)

1s² 2s² 2p⁶ 3s² 3p^4

Atomic number = 2 + 2 + 6 + 2 + 4 = 16

Group = 16

Period = 3

Name = Sulphur

Symbol = S

6)

1s² 2s² 2p⁶ 3s¹

Atomic number = 2 + 2 + 6 + 1 = 11

Group = 1

Period = 3

Name = Sodium

Symbol = Na