Naturally occurring iron contains 5.82% 54fe, 91.66 % 56fe, 2.19% 57fe, and 0.33% 58fe. the respective atomic masses are 53.940 amu, 55.935 amu, 56.935 amu, and 57.933 amu. calculate the average atomic mass of iron.

The atomic mass of iron is 55.85 u.

The average atomic mass of Fe is the weighted average of the atomic masses of its isotopes.

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its % abundance).

Thus,  

0.0582 × 53.940 u = 3.139 u

0.9166 × 55.935 u = 51.270 u

0.0219 × 56.935 u =  1.247 u

0.0033 × 57.933 u = 0.191 u

TOTAL = 55.85 u

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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