Question

pls...ans all the questions...most of them r MCQs !!! no spams pls!!!! chapter periodic classification

Answer 1

Answer:

B

D

A

C

B

A

C is the answer

mark me brainliest

Answer 2

Answer:1)b

2)a

3)b

4)d

6)c

7)b

Explanation:1) As modern periodic table was based on atomic number which represents electronic configuration

2) sodium has electronic config of 2,8,1 which belongs to group 1 and period 3

3) valence electron always represents group no

for eg :valence electron = 1, group 1

4) phosphorous is only element of 3rd period in options

7) group 2 is known as alkaline earth metals