Weighted Avg. Atomic Mass, Bohr Models & Electron configurations

Front

What is the charge of an atom that has gained one electron?

Back

-1

Front

What is the formula to calculate the weighted average atomic mass of an element?

Back

Weighted Average Atomic Mass = (fraction of isotope 1 * mass of isotope 1) + (fraction of isotope 2 * mass of isotope 2) + ...

Front

What is the average atomic mass of an element with isotopes of 75.23 amu (24.1%), 74.61 amu (48.7%), and 75.20 amu (27.2%)?

Back

74.92 amu

Front

Which isotope of lead is likely to be the most abundant if the average atomic mass is 207.2?

Back

Lead-207

Front

What atom matches the electron configuration 1s² 2s² 2p⁶ 3s²?

Back

Magnesium

Front

What is the electron configuration for Neon?

Back

1s² 2s² 2p⁶

Front

What is the significance of isotopes in determining the average atomic mass of an element?

Back

Isotopes have different masses and their relative abundances affect the average atomic mass.

Front

What is the charge of an atom that has lost two electrons?

Back

+2

Front

How do you determine the most abundant isotope of an element?

Back

The most abundant isotope is usually the one closest to the average atomic mass.

Front

What is the electron configuration for Potassium?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹