Which electron shell contains the valence electrons of a radium atom in the ground state?

1. the sixth shell 2. the second shell 3. the seventh shell 4. the eighteenth shell

Which is the molar mass of BF3? 10.81 g/mol 29.81 g/mol 48.81 g/mol 67.81 g/mol

Why are metals generally good conductors of electricity? 1. metals have more protons. 2. metals have strong bonding with other atoms. 3. metals have free electrons in their outer shell?

In which situation would the gravitational potential energy between you and earth be the greatest. A. you are running down a hill B. you are running up a hill C. you stand at the bottom of a hill S. you stand at the top of the hill

What are Storm clouds? how are they different from other types of clouds?

How many ml of naoh are needed to neutralize 15.0 ml of 0.350m ch3cooh?

Why does bromine not react with sulphur?

What happens to the size of the atom of anon-metal as it becomes an anion? A. it decreases B. it increases C. it remains the same D. it is impossible to tell unless you know the specific element

How is oxygen and nitrogen alike

Does a gas discharge tube filled with boron emit the same wavelength

a certain solution has a molarity of m = 6.39 mol/l and has a volume of v = 0.550 l what is the value of n