PS.PSc.1. Matter and Its Interactions Test Review

What is the atomic number of Oxygen?

• 15.999

• 8

• O

• 10

The atomic number tells the number of protons in the Nucleus. How many protons are in the element Carbon?

• 6

• 12.011

• 12

• 8

A scientist uses an instrument to study the small particles in a piece of matter. The diagram shows what the scientist sees.

What state of matter is the scientist most likely observing?

• gas

• solid

• liquid

• vapor

A scientist uses an instrument to study the small particles in a piece of matter. The diagram shows what the scientist sees.

What state of matter is the scientist most likely observing?

• gas

• solid

• liquid

• vapor

A scientist uses an instrument to study the small particles in a piece of matter. The diagram shows what the scientist sees.

What state of matter is the scientist most likely observing?

• gas

• solid

• liquid

• plasma

What does the nucleus of the atom contain?

• Electrons and protons
• Neutrons and electrons
• Protons and photons
• Protons and neutrons

Why to elements in the same group behave similarly?

• Because they have the same number of valence electrons.
• Because they have the same number of protons.
• Because they have the same mass number.
• Because they have the same atomic number.

What role does the valence electron play in the structure of an element?

• Plays no role in the structure of an element
• Determines the chemical properties and reactivity of an element
• Determines the color of an element
• Affects the boiling point of an element

How many electrons are able to be on the first energy layer of an atom?

• 2
• 3
• 10
• 5

How many atoms are able to be on the second energy layer of an atom?

• 5
• 12
• 8
• 2