Unit 1 Vocabulary Classwork

What is the smallest unit into which matter can be divided without the release of electrically charged particles?

• Ion

• Atom

• Molecule

• Electron

An isotope is any of two or more forms of a chemical element having the same number of protons in the nucleus but different numbers of ______.

• Electrons

• Neutrons

• Protons

• Ions

What is an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons called?

• Isotope

• Ion

• Molecule

• Proton

A neutron is an elementary particle having no charge, with a mass slightly greater than that of a ______.

• Proton

• Electron

• Ion

• Atom

A valence electron is an electron of an atom located in the outermost shell that can be transferred to or shared with another ______.

• Proton

• Neutron

• Atom

• Ion

What is the positively charged mass within an atom, composed of neutrons and protons?

• Electron

• Nucleus

• Ion

• Molecule

The atomic number is the number of units of positive charge, also known as ______.

• Electrons

• Neutrons

• Protons

• Ions

The temperature at which a given solid will melt is known as the ______.

• A) Boiling point

• B) Melting point

• C) Density

• D) Atomic mass

What is the temperature at which a liquid boils and turns to vapor?

• Melting point

• Boiling point

• Density

• Atomic mass

Density is the degree of consistency measured by the quantity of mass per unit ______.

• Volume

• Temperature

• Pressure

• Area