Understanding Isotopes: A Chemistry Quiz

What does the atomic number of an element represent?

• Number of protons

• Number of electrons

• Number of neutrons

• Total mass of the atom

What causes different isotopes of the same element to have different mass numbers?

• Different atomic numbers

• Different number of neutrons

• Different number of protons

• Different number of electrons

Are Carbon and Nitrogen isotopes of each other?

• No, because they are in different groups on the periodic table

• Yes, because they have different mass numbers

• No, because they have different numbers of protons

• Yes, because they are both nonmetals

How many neutrons does Carbon-12 have?

• 6

• 14

• 8

• 12

What is the mass number of an isotope with 6 protons and 8 neutrons?

• 8

• 14

• 6

• 2

Which of the following is not an example of isotopes?

• Nitrogen-14 and Nitrogen-15

• Carbon and Nitrogen

• Carbon-12 and Carbon-14

• Hydrogen and Deuterium

What characteristic do all isotopes of the same element share?

• Same number of protons

• Same mass number

• Same number of neutrons

• Same chemical properties

Why do isotopes have the same chemical properties?

• Because they are in the same period on the periodic table

• Because they have the same mass number

• Because they have the same number of protons

• Because they have the same number of electrons

Which pair consists of isotopes?

• Oxygen-16 and Oxygen-18

• Hydrogen and Helium

• Boron-10 and Carbon-12

• Uranium-235 and Uranium-238

What is the neutron count in Chlorine-37 if it has 17 protons?

• 20

• 54

• 17

• 37