1.

how many electrons are present in the atom of an element electrons are present in three shells. the outmost shell has 7 electrons. There are18 neutrons in the nucleus of atom​

Answer»

Answer:

8 electrons

So... for the element of OXYGEN, you already know that the atomic NUMBER tells you the number of electrons. That means there are 8 electrons in an oxygen atom.

Explanation:

Answer

Correct option is

D

13

Electronic configuration of Cr (atomic number 24) =[Ne]3S

2

3p

6

3d

5

4s

1

Therefore number of electrons in M shell (THIRD shell) =2+6+5=13.


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