Although helium has only Electrons in its outer shell it is grouped with elements that have

A6.10 m nacl can be made by adding [x]g of nacl to a container and making the volume of water up to the 1.00 l line

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false