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 approximately 74.92, Bi is approximately 208.98.

Step2: Order elements

N < As < Bi.

Step3: Recall atomic masses for second set

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

Step4: Order elements

Ne < Ar < Rn.

Step5: Recall atomic masses for third set

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

Step6: Order elements

Ca < Fe < Pb.

Answer:

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