Question

tell me the correct ans I will mark u as brainlist​

Answer 1

Answer:

enter your standard for example if you study 10 means

search in Chrome as sameercher kalvi guide

and you will find the top much results

Answer 2

Answer:

please mark my answer as brainliest answer

Explanation:

1) atomic number is 20

2)mass number is 40

3) element is calcium

4) electronic configuration is 1s2 2s2 2p6 3s2 3p6 4s2