Chemistry Review

Which of the following is described as the basic unit of matter?

• Element
• Atom
• Molecule
• Compound

Tags

NGSS.MS-PS1-1

In the atom diagram shown, E is pointing to

• An electron
• a proton
• a neutron
• the nucleus

Tags

NGSS.MS-PS1-1

B and C are found in the ______ of an atom.

• electron cloud
• Space
• Nucleus
• Outside

Tags

NGSS.MS-PS1-1

In this chemical equation, the elements in red are the_______.

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the atomic mass of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

What is the atomic number of this atom?

• 4
• 5
• 9
• none of the above

Tags

NGSS.MS-PS1-1

What is a valence electron?

• an electron that is found in the outermost orbital of an atom. 
• an electron found in the innermost orbital of an atom.
• an electron found in the middle orbital.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Using the information provided, determine how many electrons the a Boron atom contains.

• 2.5

• 5

• 6

• 10.81

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

Which of the following is an example of a physical change, and why? 

• Fire burns in fireplace, because a new substance is formed. 
• Clothes are folded, because there is a color change. 
• A mirror is broken, because there is a change in shape/size.
• cookies are baked, because there is a change in temperature