Understanding Atoms, Molecules, and Compounds

What is the smallest unit of matter?

• Electron

• Atom

• Compound

• Molecule

What particles are found in the nucleus of an atom?

• Protons, Neutrons, and Electrons

• Protons and Neutrons

• Neutrons and Electrons

• Electrons and Protons

What charge do protons carry?

• Variable

• Neutral

• Negative

• Positive

What defines the atomic number of an element?

• Number of electrons

• Number of neutrons

• Number of protons

• Total mass of the atom

What are the uncharged particles in the nucleus called?

• Protons

• Electrons

• Neutrons

• Isotopes

What is the mass of an atom based on?

• The sum of the mass of electrons

• The mass of the nucleus alone

• The sum of the mass of protons and electrons

• The sum of the mass of protons and neutrons

What type of bond involves the sharing of electrons?

• Ionic bond

• Hydrogen bond

• Covalent bond

• Metallic bond

What is a molecule?

• A combination of the same or different atoms physically connected

• A combination of any atoms

• A combination of different atoms

• A type of atom

How are atoms in a molecule held together?

• By sharing or transferring electrons

• By magnetic forces

• By gravitational forces

• By nuclear forces

What makes a compound different from a molecule?

• Molecules are always liquids

• Compounds can only be made of the same type of atom

• Compounds are not chemically bonded

• Compounds consist of different elements chemically combined