Question

Answer the question below based on the periodic table entry for bromine. How many electrons are in the n = 2 orbit?

2
8
18
7

Answer 1

The answer is B (8 electrons)

Answer 2

8 Electrons

Step-by-step explanation:

In statement the letter "n" specifies the Principle Quantum Number. Principle Quantum number is main energy level of an atom. Hence, n = 2 means we are talking about the second energy level or second shell of an atom.

Also, the number of electrons present in any main energy level are calculated by using following formula,

2n²

Hence, as,

n = 2

So, by putting this value in above formula,

2 (2)²

2 (4)

8