Introduction to Chemistry for Shanel

What is the basic unit of matter?

• compound

• atom

• cell

• molecule

What is the chemical symbol for water?

• H2O2

• H2O3

• O2H

• H2O

What is the process of a solid turning into a liquid called?

• Freezing

• Sublimation

• Melting

• Condensation

What do we call a substance made of two or more elements?

• element

• mixture

• solution

• compound

What is the pH scale used to measure?

• The density of a solution.

• The color of a solution.

• The temperature of a solution.

• The acidity or alkalinity of a solution.

What is the term for a reaction that absorbs heat?

• endothermic reaction

• exothermic reaction

• catalytic reaction

• spontaneous reaction

What is the chemical formula for table salt?

• KCl

• MgCl2

• CaCl2

• NaCl

What is the name of the gas that plants take in during photosynthesis?

• carbon dioxide

• hydrogen

• oxygen

• nitrogen

What is the difference between an element and a compound?

• An element consists of one type of atom, while a compound consists of two or more different elements chemically bonded together.

• A compound is a single type of atom.

• An element can be made of multiple types of atoms.

• Elements can be broken down into simpler substances.

What is the term for the amount of space an object occupies?

• volume

• weight

• mass

• density