Regents Chemistry Review

This number is used to represent the number of each atom being represented.  What is the name of this number? 

• An Exponent

• The Coefficient

• A Molecule

• The Subscript

The atomic number of oxygen is

• 8

• 15.9994

• 16

• O

Tags

NGSS.MS-PS1-1

Is this equation balanced?

• Yes

• No

• Not enough information

Tags

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

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

• A Prime Number

• The Coefficient

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

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

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