Physical Science Final Exam

Which mixture is homogeneous?

• A
• B
• A and B
• Neither

Which letter shows a gas?

• A
• B
• C
• D
• E

The phase change in which a substance changes from a solid to a liquid is

• freezing
• melting
• sublimation
• condensation

Which subatomic particle has a negative charge?

• proton
• nutron
• electron
• nucleolus

The number of protons in one atom of an element is the same as the

• mass number
• balanced charge
• atomic number
• isotope

As you move from left to right across a period, the number of valence electrons

• increase
• stay the same
• decrease

An anion is

• a negative ion
• a positive ion
• a neutral ion

A cation is

• a negative ion
• a positive ion
• a neutral ion

How many atoms of oxygen are in the compound calcium carbonate?

• 3
• 1
• 0

Balance the equation below:

• 3,2,2
• 1,3,2
• 2,1,3
• 2,6,5