Chemistry Mid-Unit Test

How many neutrons are in an atom of Sulfur?

The nucleus of an atom is made up of

• Protons
• Electrons
• Neutrons

What element does this atom represent?

• Lithium
• Oxygen
• Carbon
• Sulfur

Which of the following is represented by the picture? (Check all that apply)

• Compound
• Molecule
• Atom
• Element

Which element has 19 protons?

• Fluorine
• Potassium
• Calcium
• Oxygen

How do you find the number of neutrons?

• Look at the atomic number
• Neutrons are equal to the number of protons
• Mass- # of protons
• Mass + # of protons

What charge do electrons have?

• Positive
• Negative
• Neutral

Which element is in group 2 and period 4?

• Beryllium
• Calcium
• Titanium
• Potassium

What is the only metalloid in period 3?

• Boron
• Silicon
• Germanium
• Aluminum

Classify as physical or chemical. You cut your hair.

• Physical
• Chemical