Atomic Structure Quiz

What is the basic structure of an atom?

• Central nucleus surrounded by neutrons

• Central nucleus surrounded by protons

• Central nucleus surrounded by positrons

• Central nucleus surrounded by electrons

What are the two types of particles in the nucleus of an atom?

• Neutrons and positrons

• Protons and neutrons

• Electrons and positrons

• Protons and electrons

What is the relative mass of protons and neutrons?

• Neutrons are heavier than protons

• Protons and neutrons have the same mass

• Protons are heavier than neutrons

• Protons and neutrons have no mass

What is the charge of electrons?

• Variable

• Negative

• Neutral

• Positive

What is the size of an atom?

• 100 nanometers

• 1 nanometer

• 0.1 nanometers

• 10 nanometers

What happens when an atom loses or gains electrons?

• It becomes an ion

• It becomes a molecule

• It becomes a mixture

• It becomes a compound

What does the atomic number of an element represent?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of electrons in the outer shell

How many protons does an oxygen atom have?

• 6

• 9

• 7

• 8

What is the mass number of lithium?

• 7

• 6

• 3

• 4

How many neutrons does a lithium atom have?

• 1

• 2

• 4

• 3