Isotope Review

What do these isotopes of carbon all have in common?

• neutron number and mass number

• atomic number and neutron amount

• atomic number and electron number

• protons, atomic number, and mass number

Tags

NGSS.HS-PS1-8

Potassium-39 has how many neutrons?

• 19

• 18

• 20

• 21

Tags

NGSS.HS-PS1-8

Isotopes of an element have a different number of:

• Protons

• Neutrons

• Electrons

• Mass

Tags

NGSS.HS-PS1-8

Bromine-80 has how many neutrons?

• 41

• 42

• 44

• 45

Tags

NGSS.HS-PS1-8

Which isotope has 76 protons and 114 neutrons?

• Osmium-114

• Osmium-76

• Osmium-190

• Osmium-190.23

Tags

NGSS.HS-PS1-8

Which isotope has 9 protons and 9 neutrons?

• Fluorine-18

• Fluorine-9

• Fluorine-16

• Fluorine-18.998

Tags

NGSS.HS-PS1-8

There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope ⁶⁵Cu composes 69.2% of the sample and ⁶³Cu comprises the other 30.8%. Based on this data, what is the atomic mass of copper?

• 29 amu

• 63.546 amu

• 64.4 amu

• 63.6 amu

How do you calculate the Mass Number of an atom?

• Mass x percent

• Protons + Electrons

• Protons + Neutrons

• Neutrons + Protons + Electrons

Rubidium has two common isotopes, ⁸⁵Rb and ⁸⁷Rb. If the abundance of ⁸⁵Rb is 72.2% and the abundance of ⁸⁷Rb is 27.8%, what is the average atomic mass of rubidium?

• 85.468 amu

• 37 amu

• 85.6 amu

• 86.4 amu

Isotopes are atoms of the same element with different #’s of __________ & therefore, different __________.

• neutrons ; atomic numbers

• protons ; atomic numbers

• electrons ; mass numbers

• neutrons ; mass numbers

Tags

NGSS.HS-PS1-8