The Atomic Mass - (minus) The Atomic Number tells you the number of protons in an element If an element is an ion, it has more or less neutrons than usual.

Elements in the same vertical column are called Periods.

The 3 groups of the periodic table are metals, non-metals, and gases.

TRUE OR FALSE plzz helppp!!

Listenbase your answer to the question on the information below.nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body.cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment.which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61