Ch. 4.3 - Distinguishing Among Atoms

Ch. 4.3 - Distinguishing Among Atoms

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Multiple Choice

True or False? The atomic number of an element is the sum of the protons and electrons in an atom of that element.

• True

• False

Multiple Choice

Three isotopes of chromium are chromium-50, chromium-52 and chromium-53. How many neutrons are in chromium-50 given that the atomic number is 24?

• 50

• 26

• 24

• 74

Multiple Choice

Three isotopes of chromium are chromium-50, chromium-52 and chromium-53. How many neutrons are in chromium-52 given that the atomic number is 24?

• 52

• 26

• 28

• 76

Multiple Choice

Three isotopes of chromium are chromium-50, chromium-52 and chromium-53. How many neutrons are in chromium-53 given that the atomic number is 24?

• 29

• 26

• 28

• 24

Multiple Choice

True or False? An atom of nitrogen has 7 protons and 7 neutrons.

• True

• False

Multiple Choice

Boron has two isotopes: boron-10 and boron-11. Which is more abundant, given that the atomic mass of boron is 10.81?

• Boron-10

• Boron-11

• They are both the same