Question

the atomic masses of three elements a,b,and c having similar chemical properties are 7,23and39 respectively then a) calculata the average atomic masses of elements b)compare the average atomic mass with atomic mass of b c) what could the elements a,b,andc be

Answer 1

(1)avg mass =7+23+39/2
=34.5
(2)1:3.2:5.5
(3)a=Li
b=Na
c=K

Answer 2

Answer:A=7

C=23 SO,WE SHOULD FIND B

Explanation:ADD A AND C AND DIVIDE WITH 2

= 23+7

=30

=30/2

B=15