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

Atomic mass of N is approximately 14.01, As is about 74.92, Bi is around 208.98.

Step2: Order first - set

N, As, Bi

Step3: Recall atomic masses for second - set

Atomic mass of Ne is about 20.18, Ar is around 39.95, Rn is approximately 222.

Step4: Order second - set

Ne, Ar, Rn

Step5: Recall atomic masses for third - set

Atomic mass of Ca is about 40.08, Fe is around 55.85, Pb is approximately 207.2.

Step6: Order third - set

Ca, Fe, Pb

Answer:

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