1.19 Unit Test Review

Which subatomic particle has a positive charge?

• proton

• neutron

• electron

• all particles

Which subatomic particle has a negative charge?

• proton

• neutron

• electron

• all particles

Which model of the atom first introduced the idea of a nucleus?

• Dalton's model

• Rutherford's model

• Bohr's model

• Thomson's model

Which model of the atom has electrons traveling in specific paths around the nucleus?

• Dalton's model

• Rutherford's model

• Bohr's model

• Thomson's model

What information does the atomic mass of an element provide?

• the sum of electrons and protons in an atom

• the difference between the number of protons and electrons

• the number of protons and neutrons in an atom

• the number of isotopes

What is the atomic number of an atom?

• the number of electrons and neutrons

• the number protons and neutrons

• the number of neutrons

• the number of protons

Two atoms that are isotopes of one another must have the same number of what?

• protons

• neutrons

• electrons

• all particles

Two atoms that are isotopes of one another must have a different number of what?

• protons

• neutrons

• electrons

• all particles

What is the smallest particle representing water?

• a hydrogen atom

• a molecule

• an oxygen atom

• diatomic oxygen

What is the smallest particle representing hydrogen peroxide?

• a hydrogen atom

• a molecule

• an oxygen atom

• diatomic oxygen