Understanding Atoms

What is the main focus of this lesson on atoms?

• The role of atoms in biology

• Chemical reactions involving atoms

• The structure and properties of atoms

• The history of atomic theory

Which subatomic particle has a positive charge?

• Electron

• Positron

• Neutron

• Proton

Which particles are found in the nucleus of an atom?

• Protons and neutrons

• Electrons only

• Neutrons and electrons

• Electrons and protons

What determines the identity of an element?

• Number of electrons

• Number of neutrons

• Number of protons

• Number of energy shells

Which subatomic particles have a relative mass of one?

• Protons only

• Electrons and protons

• Protons and neutrons

• Neutrons and electrons

Which subatomic particle is neutral?

• Neutron

• Electron

• Proton

• Ion

What is an atom with a positive or negative charge called?

• Ion

• Positron

• Molecule

• Element

What is the charge of an electron?

• Neutral

• Negative

• Variable

• Positive

What do we call the rings in which electrons orbit the nucleus?

• Energy levels

• Neutron shells

• Proton rings

• Nucleus

If an atom has six protons and five electrons, what is its overall charge?

• Plus six

• Neutral

• Plus one

• Minus one