Consider four different atoms: Sodium (Na), Radium (Ra), Bismuth (Bi), and Neon (Ne).

1. Rank the four atoms according to their mass, from smallest to largest. Use their symbols (like He for helium), and separate them with commas

2. Rank the four atoms according to the number of protons in their nucleus, from the biggest number of protons to the smallest number of protons. Use their symbols (like He for helium), and separate them with commas.