Which of the following isotopes is NOT considered to be a major threat to human health from nuclear fallout? a. strontium-90 b. hydrogen-2 c. iodine-131 d. cesium-137

Each of the following compounds contains a metal that can exhibit more than one ionic charge. provide systematic names for each of these compounds. (a) cr(clo3)6 (b) mo(cn)6 (c) cr2(so3)3 (d) v(clo2)2 (e) v(cn)5 (f) os(clo2)4

Why are the trends and exceptions to the trends in ionization energy observed?

What’s the scientific notation for the number 6,840,000,000