Unit 1 Ess Chemistry

Everything that has mass and that takes up space is called...

• energy

• matter

• molecule

• atom

What is the smallest part of matter?

• a compound

• a solution

• an element

• a molecule

The smallest part of an element is ________.

• a solution

• an atom

• a compound

• a molecule

Protons have a _____________________ charge.

• Negative

• Neutral (no charge)

• Positive

Neutrons have a _____________________ charge.

• Negative

• Neutral (no charge)

• Positive

Electrons have a _____________________ charge.

• Negative

• Positive

• Neutral (no charge)

Which of the following are elements?

• Water

• Hydrogen

• Oxygen

• Salt

• Carbon

Periods on the periodic table are __________.

• Horizontal Rows
• Vertical Columns

Elements in the same group have : (2 correct answers)

• Similar chemical properties

• Similar names

• Same number of outer (valence) electrons)

• The same number of protons

Which is a halogen?

• Helium
• Chlorine
• Oxygen
• Neptune