Chemistry 4.3

Open Ended

Open Ended

What information is needed to determine the composition of a neutral atom of any element?

Open Ended

Why are atoms with different numbers of neutrons still considered to be the same element?

Open Ended

The atomic mass of copper is 63.546 amu. Which of copper’s two isotopes is more abundant: copper-63 or copper-65

Open Ended

Element X has two naturally occurring isotopes. The isotope with a mass of 10.012 amu (10X) has a relative abundance of 19.91 percent. The isotope with a mass of 11.009 amu (11X) has a relative abundance of 80.09 percent. Calculate the atomic mass of element X.

Open Ended

Why is the atomic mass of an element usually not a whole number?

​Isotope Gizmo

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Multiple Choice

Given the following table, which statement is true about atoms A and B?

• A  & B are isotopes of the same element

• A & B are isotopes of different elements

• The 2 atoms ave the same mass

• only atom B is an isotope

Multiple Choice

Given the following table, which statement is true about atoms A and B?

• 26 protons and 56 neutrons

• 26 protons and 26 neutrons

• 30 protons and 56 neutrons

• 26 protons and 30 neutrons

Multiple Choice

Which of the following is the most stable isotope?

• Polonium-210

• Uranium-237

• Francium-227

• Plutonium--238

Multiple Choice

Which of the following is the correct notation for an isotope with 3 protons and 5 neutrons?

• A

• B

• C

• D

Multiple Choice

As the mass of the nucleus increases, what happens to the ratio of neutrons to protons in stable isotopes?

• The neutron:proton ratio decreases

• The neutron:proton ratio increases

• The neutron:proton ratio remains 1:1

• The neutron:proton ratio remains 1.5:1