Chemistry NCFE Review

Identify the elements in this compound.

• Carbon, Helium, Oxygen

• Chromium, Hydrogen, Oxygen

• Calcium, Hydrogen, Oxygen

• Carbon, Hydrogen, Oxygen

Tags

NGSS.MS-PS1-1

Which of the following is a chemical change?

• Iron rusting 

• Glass breaking

• Clothing ripping

• Hair cut

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Yes

• No

• Not enough information

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

How many hydrogen atoms are in this chemical formula: 

• 4 hydrogen atoms

• 1 hydrogen atom

• 2 hydrogen atoms

• 3 hydrogen atoms

Tags

NGSS.MS-PS1-1

The number of electrons in a Lithium atom is

• 3

• 4

• 6

• 7

Tags

NGSS.MS-PS1-1

The opposite phase of melting is

• Condensation

• Vaporization

• Sublimation

• Freezing

Tags

NGSS.MS-PS1-4

Electrons are

• Positively charged particles

• Negatively charged particles

• Neutral

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

• 1

• 2

• 3

• 4

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

• Metals

• Non-metals

• Metalloids