Exploring Atomic Masses and the Periodic Table

What are protons and neutrons made up of?

• Electrons

• Atoms

• Quarks

• Molecules

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What binds quarks together inside protons and neutrons?

• Electrons

• Gluons

• Neutrons

• Photons

What is the mass number of an atom?

• The sum of protons and neutrons

• The atomic number

• The number of electrons

• The number of protons

What does the atomic number of an element represent?

• The number of neutrons

• The number of protons

• The number of electrons

• The mass number

In a neutral atom, the number of protons is equal to the number of what?

• Gluons

• Neutrons

• Electrons

• Quarks

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How can you determine the number of neutrons in an atom?

• By adding the atomic number and mass number

• By subtracting the atomic number from the mass number

• By counting the electrons

• By dividing the mass number by the atomic number

What are atoms of the same element with different numbers of neutrons called?

• Compounds

• Molecules

• Isotopes

• Ions

Which of the following is an example of an isotope of boron?

• Boron-10

• Boron-12

• Boron-13

• Boron-9

What does the average atomic mass on the periodic table represent?

• The mass of the most common isotope

• The number of electrons

• The sum of protons and neutrons

• The average weight of all isotopes of an element

What is the average atomic mass of boron?

• 11.00 amu

• 11.81 amu

• 10.81 amu

• 10.00 amu