Question

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Answer 1

Answer:

K = 2

L =8

M = 8

N = 2

( 2,8,8,2 ) =20

1. atomic number is 20

2.it is a S block elements. so it is at the left side of the periodic table

3. it is a metal

4.2a group elements. alkaline earth metals

5.the valence of the element is 2

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Answer 2

Answer:

the answer key when below are in series:-

1. its atomic number is 20
2. its atomic number is 20it is from s block elements, group 2, and period 4
3. its atomic number is 20it is from s block elements, group 2, and period 4it is a metal
4. its atomic number is 20it is from s block elements, group 2, and period 4it is a metalit is alkaline earth metal.
5. its atomic number is 20it is from s block elements, group 2, and period 4it is a metalit is alkaline earth metal.its valency is 2

Explanation:

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