Question

If an element has 9 electrons, how many of them will be in the 2nd energy level?

Answer 1

there will be 7. because the maximum number of electrons in the first Shell is 2 and the rest are 8 so there will be 2 in the first and 7 inthe second

Answer 2

Step-by-step explanation:

According to the atomic number of an atom, each atom contains different number of energy shells. These are K, L, M, N etc.

K shell of every atom contains 2 electrons. L shell of an atom contains 8 electrons, M shell of an atom contains 8 electrons and so on.

For example, an element with 9 electrons has electronic distribution as 2, 7.

That is, there are 7 electrons in second energy shell of this atom.

Thus, we can conclude that if an element has 9 electrons, then there are 7 electrons in the 2nd energy level.