Quiz on Atomic Structure and Isotopes

What is the atomic number of an element?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of nucleons

What is the mass number of an element?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of nucleons

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

• Neutrons

• Protons

• Nucleons

• Isotopes

What do isotopes of an element have in common?

• Same mass number

• Same nucleon number

• Same proton number

• Same neutron number

What is the half-life of a substance?

• Time taken for the activity to double

• Time taken for the activity to halve

• Time taken for the mass to halve

• Time taken for the mass to double

An isotope of carbon contains 6 protons and 8 neutrons. What is its atomic number?

• 6

• 8

• 12

• 14

An isotope of carbon contains 6 protons and 8 neutrons. What is its mass number?

• 6

• 8

• 12

• 14

How many electrons would a neutral carbon atom have if it has 6 protons?

• 4

• 6

• 8

• 10

What is the symbol for an isotope of carbon with 6 protons and 8 neutrons?

• ^{12}_6C

• ^{14}_6C

• ^{16}_6C

• ^{8}_6C

Which of the following atoms are isotopes of the same element?

• ^{4}_2He and ^{12}_6C

• ^{12}_6C and ^{16}_8O

• ^{16}_8O and ^{17}_8O

• ^{54}_{26}Fe and ^{16}_8O