Isotopes

Front

How many neutrons would Fe-56 have?

Back

30

Front

If an atom of oxygen has a charge of -2, how many electrons does the atom have? Options: 18, 6, 8, 10

Back

10

Front

How many neutrons does the isotope ⁸⁹ ₃₆Kr have?

Back

53

Front

Which symbols represent isotopes of the same element?   I. ⁷⁷₃₅X  II. ⁷⁷₃₃X  III. ⁸¹₃₇X  IV. ⁸¹₃₅ X

Back

I and IV

Front

Which isotope of lead is likely to be the most abundant given the isotopes: lead-204, lead-206, lead-207, and lead-208, with an average atomic mass of 207.2?

Back

lead-207

Front

What is the name of the pictured isotope? Options: Copper-29, Copper-63, Copper-34, CopperWopperHopperBopper

Back

Copper-63

Front

24.1% of all the isotopes of an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu. What is the average mass of this element?

Back

74.92 amu

Front

Calcium has three different isotopes with masses of 35.00 amu, 41.00 amu, and 40.00 amu. Which isotope is the most abundant?

Back

40.00 amu

Front

An isotope has three forms: 30% with a mass of 4 amu, 20% with a mass of 5 amu, and 50% with a mass of 3 amu. What is the average atomic mass?

Back

4 amu

Front

How many neutrons are in the isotope pictured above?

Back

34