List the following elements in order of INcreasing number of valence electrons: C, Cl, As, Na, He

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

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