Chemistry, asked by riyasrajan, 8 days ago

The third shell (M shell)of an element 'X' contains 8 electrons, it's mass number 40

Answers

Answered by pulakkumarsarkar15

0

Answer:

x is calcium

Explanation:

as it has mass no 40 and atomic number 20 with electronic configuration of 2,8,8,2 and it's third shell has 8 electrons.

Answered by lakshmiktr15

0

Answer:

Zirconium

Explanation:

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