Chemistry Review

Identify the elements in this compound.

• Carbon, Helium, Oxygen

• Chromium, Hydrogen, Oxygen

• Calcium, Hydrogen, Oxygen

• Carbon, Hydrogen, Oxygen

Tags

NGSS.MS-PS1-1

The number of electrons in a Lithium atom is

• 3

• 4

• 6

• 7

Tags

NGSS.MS-PS1-1

A group of elements that are shiny, conduct heat and electricity well is called

• Metals

• Non-metals

• Metalloids

What is made up two or more elements that are chemically combined?

• Atom

• Element

• Compound

• Mixture

Tags

NGSS.MS-PS1-1

Which of the following is evidence of a chemical change?  

• Change in state

• No new substance is formed

• Bubbles forming

• Change in shape

Tags

NGSS.MS-PS1-2

This appears on the left side of a chemical formula, and represents how many compounds there are.  What is the name of this number?

• Dangling Participle 

• The Subscript

• Prime Number

• Coefficient

The opposite phase of melting is

• Condensation

• Vaporization

• Sublimation

• Freezing

Tags

NGSS.MS-PS1-4

Electrons are

• Positively charged particles

• Negatively charged particles

• Neutral

Tags

NGSS.MS-PS2-3

If an atom has 3 electrons, how many protons does it have?

• 1

• 2

• 3

• 4

What does the nucleus of an atom contain?

• Electrons and neutrons

• Protons and neutrons

• Electrons and protons

• DNA