Which object reflects light with with the longest wave

Metallic bonds are good conductors of electricity true or false

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.