Question

for each list, place elements in order of least to greatest atomic mass: 1) bi bismuth n nitrogen as arsenic 2) ar argon rn radon ne neon 3) pb lead fe iron ca calcium

Explanation:

Step1: Recall atomic masses

N (Nitrogen) has an atomic mass of approximately 14.01, As (Arsenic) has an atomic mass of approximately 74.92, Bi (Bismuth) has an atomic mass of approximately 208.98.

Step2: Order elements

So the order for the first set is N, As, Bi.

Step3: Recall atomic masses for second set

Ne (Neon) has an atomic mass of approximately 20.18, Ar (Argon) has an atomic mass of approximately 39.95, Rn (Radon) has an atomic mass of approximately 222.

Step4: Order elements

So the order for the second set is Ne, Ar, Rn.

Step5: Recall atomic masses for third set

Ca (Calcium) has an atomic mass of approximately 40.08, Fe (Iron) has an atomic mass of approximately 55.85, Pb (Lead) has an atomic mass of approximately 207.2.

Step6: Order elements

So the order for the third set is Ca, Fe, Pb.

Answer:

1. N, As, Bi
2. Ne, Ar, Rn
3. Ca, Fe, Pb