Basic Chemistry

Which subatomic particle determines the identity of an element?

• Electron

• Neutron

• Proton

• Nucleus

What is the charge of a neutron?

• Positive

• Negative

• Zero

• Depends on the atom

In the modern atomic model, where are electrons located?

• Inside the nucleus

• Orbiting the nucleus

• Inside protons

• Inside neutrons

What defines the atomic number of an element?

• Number of neutrons

• Number of electrons

• Number of protons

• Mass number

Which atomic model introduced energy levels?

• Dalton

• Thomson

• Rutherford

• Bohr

Which particles are located in the nucleus of an atom?

• Protons and neutrons

• Electrons and protons

• Only electrons

• Only neutrons

What process creates elements heavier than hydrogen?

• Nuclear fission

• Nuclear fusion

• Radioactive decay

• Ionization

What causes light emission in atoms?

• Neutron absorption

• Electron movement between energy levels

• Proton decay

• Nuclear fusion

Why do isotopes of an element have different masses?

• Different electron numbers

• Different proton numbers

• Different neutron numbers

• Different charges

What can the periodic table predict about an element?

• Number of neutrons

• Boiling point

• Properties based on valence electrons

• Atomic weight of isotopes