Atoms DNA

What is everything made up of?

• Particles

• Molecules

• Atoms

• Cells

What orbits around the nucleus in an atom?

• Neutrons

• Protons

• Electrons

• Ions

What are the two types of particles found in the nucleus?

• Neutrons and Electrons

• Protons and Neutrons

• Ions and Electrons

• Electrons and Protons

What is the relative mass of protons and neutrons?

• 1

• 2

• 0

• 1000

What charge do electrons have?

• Negative

• Positive

• Neutral

• No charge

What happens to an atom when it gains or loses electrons?

• It becomes a compound

• It becomes an ion

• It remains neutral

• It becomes a molecule

What is the charge of an ion with more protons than electrons?

• Zero

• Positive

• Neutral

• Negative

What does the atomic number tell us?

• Number of electrons

• Number of neutrons

• Number of protons

• Total mass of the atom

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

• Electrons minus protons

• Atomic number minus mass number

• Mass number minus atomic number

• Protons plus electrons

What is the radius of most atoms?

• Approximately 0.01 nanometers

• Approximately 10 nanometers

• Approximately 1 nanometer

• Approximately 0.1 nanometers