Isotopes and Relative Atomic Mass

Front

In order for two elements to be isotopes, what has to be the SAME? Options: Protons, Electrons, Neutrons, Mass

Back

Protons

Front

In order for two elements to be isotopes, what must be DIFFERENT? Options: Protons, Electrons, Neutrons, Neutrons & Mass

Back

Neutrons & Mass

Front

Which isotope of Lithium contains 4 neutrons? Options: Li-6, Li-7, Li-8, They have the same # of neutrons

Back

Li-7

Front

Looking at the following mass spectrum of neon, how many isotopes does neon have?

Back

3

Front

Looking at the following mass spectrum of neon, which isotope is most abundant? Options: Ne-20, Ne-21, Ne-22

Back

Ne-20

Front

Looking at the following mass spectrum diagram, what would be the average atomic mass of this element? Round to 3 sig figs (only type a #, no units)

Back

10.2

Front

Nitrogen has two isotopes. One isotope has a mass of 14.003 amu and a relative abundance of 99.63%, while the other has a mass of 15.000 amu and a relative abundance of 0.37%. What is the average atomic mass for nitrogen?

Back

14.007 amu

Front

Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9 amu (92.2%), 28.9 amu (4.7%) and 29.9 amu (3.1%). Round your answer to 3 sig figs and only type a #.

Back

28.0

Front

Calculate the average atomic mass of the following element: ²⁵Y (11%), ³²Y (39%), ²⁹Y (22%), ³⁰Y (28%)

Back

30.0

Front

What do all isotopes of hydrogen have in common?

Back

1 proton