Periodic Table Terms and Vocab

What is the smallest unit of a chemical element?

• Molecule

• Atom

• Compound

• Ion

Which of the following is a substance that cannot be broken down into simpler substances by chemical means?

• Mixture

• Compound

• Element

• Solution

What is the term for the mass of an atom, typically expressed in atomic mass units (amu)?

• Atomic Number

• Atomic Mass

• Molar Mass

• Mass Number

Tags

NGSS.MS-PS1-5

What does the atomic number of an element represent?

• Number of neutrons

• Number of electrons

• Number of protons

• Number of atoms

What is the name of the table that arranges chemical elements in order of atomic number with repeating properties?

• Chemical Chart

• Elemental Table

• Periodic Table

• Atomic Table

What is a one or two-letter abbreviation for a chemical element called?

• Chemical Formula

• Chemical Symbol

• Elemental Code

• Atomic Notation

Which subatomic particle is found in the nucleus of every atom and has a positive electric charge?

• Electron

• Neutron

• Proton

• Positron

Which subatomic particle is neutral and found in the nucleus of atoms?

• Electron

• Neutron

• Proton

• Photon

Which subatomic particle has a negative charge and is found outside the nucleus of an atom?

• Electron

• Neutron

• Proton

• Positron

What is the term for the level that electrons orbit in around the atomic nucleus?

• Orbit

• Shell or Energy Level

• Layer

• Pathway

Tags

NGSS.HS-PS1-1