Sorry after taking the calculations add the values.

You read the main scale and after you read the venier scale which is straight and then you calculate the by taking the venier scale and 0.01cm 0r 0.1mm.

Given
Weight on Earth=60N
gravity on earth 10N/Kg
thus mass on earth is 6N
1/6of10N/Kg=1.6666667N/Kg
:Weight on the moon=MassxGravity(in the moon)
6Kgx1.6666667=10.0000002N
Thus the weight of the object on the moon is:10.0000002N

Valence is the combing power of an element.It has no charge valence are mostly represented by group numbers,i.e Mg is in group:2 and it has a valence of 2.