Quiz on Atomic Structure

What is the atomic number of an element equal to?

• The number of neutrons

• The number of protons

• The mass number

• The number of electrons plus neutrons

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

• The number of neutrons

• The mass number

• The number of protons

• The atomic mass

How do you calculate the number of neutrons in an atom?

• Add the atomic number and mass number

• Subtract the atomic number from the mass number

• Subtract the mass number from the atomic number

• Add the number of protons and electrons

What is the mass number of oxygen as given in the example?

• 8

• 16

• 12

• 14

How many protons does oxygen have according to the example?

• 6

• 8

• 10

• 12

How many electrons does oxygen have in a neutral atom?

• 6

• 8

• 10

• 12

What is the formula to find the number of neutrons in an atom?

• Mass number - Atomic number

• Atomic number + Mass number

• Atomic number - Mass number

• Mass number + Atomic number

What is the atomic number of oxygen?

• 6

• 8

• 10

• 12

What does the mass number represent?

• The sum of protons and electrons

• The sum of protons and neutrons

• The sum of neutrons and electrons

• The number of protons only

Which of the following is true about the atomic number?

• It is the sum of protons and neutrons

• It is equal to the number of electrons in a neutral atom

• It is always greater than the mass number

• It is the sum of electrons and neutrons