Atomic Structure Vocabulary

Which subatomic particle is negatively charged and orbits the nucleus of an atom?

• Proton

• Neutron

• Electron

• Photon

What is the term for the weighted average mass of the atoms in a naturally occurring sample of an element?

• Atomic number

• Mass number

• Atomic mass

• Isotope

Which of the following statements is part of Dalton's atomic theory?

• Atoms are made up of protons, neutrons, and electrons.

• Atoms of the same element are identical in mass and properties.

• Atoms can be divided into smaller particles.

• Atoms are mostly empty space.

What is the term for the number of protons in the nucleus of an atom, which determines the element's identity?

• Mass number

• Atomic mass

• Atomic number

• Isotope number

Which of the following best describes isotopes?

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same atomic mass but different atomic numbers

• Atoms with the same number of electrons but different numbers of protons

What is the mass number of an atom with 6 protons, 6 neutrons, and 6 electrons?

• 6

• 12

• 18

• 24

Which subatomic particle is found in the nucleus and has no charge?

• Proton

• Neutron

• Electron

• Positron

In the periodic table, what is the term for the vertical columns that group elements with similar chemical properties?

• Periods

• Groups

• Rows

• Blocks

What is the term for the horizontal rows in the periodic table?

• Groups

• Periods

• Series

• Levels

Which subatomic particle is positively charged and found in the nucleus of an atom?

• Electron

• Neutron

• Proton

• Positron