Question

question 14
this is the periodic entry for the element boron. what is the atomic mass of boron?
a 5
b 10.81
c 13
d 15.81

Explanation:

Step1: Identify atomic - mass position

In a periodic - table entry, the atomic mass is the number below the element symbol.

Step2: Read the value

For boron (B), the number below the symbol is 10.81.

Answer:

B. 10.81