What was the old percentages of copper to zinc before 1983?

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li