L7_Chemistry

What are the basic building blocks for all matter?

• atoms
• elements
• compounds
• chemicals

What do we call a chemical substance made up of 2 or more different types atoms bonded together?

• formula
• atom
• subscript
• compound

All ____________ are made up of two or more atoms bonded together.

• atoms
• molecules
• electrons
• elements

Bonds between atoms in a molecule form as a result of the sharing  of?

• formulas
• electrons
• atoms
• chemicals

When __________ form, the elements lose there individual chemical properties and take on new properties.

• compounds
• atoms
• subscript
• formula

H₂O₂← ?
This number tells the number of atoms present.

• coefficient
• molecule
• subscript
• atom

The number of atoms present in one molecule of an element is called

• Valency

• Atomicity

• Coefficient

• Formula

How do you know that rusting is a chemical change?

• it changes color

• atoms were rearranged to form a new substance

• we just know

• the rust

Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat. This is a ...

• Chemical Change

• Physical Change

• None of the above

Sugar dissolves in water. What is the change seen?

• Chemical Change

• Physical Change

• None of the above