Question

The outermost subshell of an element,which has 3 shell contains 4 electrons. What is its atomic number?​

Answer 1

Answer:

Scandium atomic number 21 is in the fourth period. s, p and d . 1st , 2st , 3rd and 4thatomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.

Answer 2

Explanation:

It should be Silicon, its in 3rd period that means it has 3 shells, and 4 electrons in the outermost shell because it is in group 4.

Its atomic number is 14.