Regents Chemistry Review

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

• Element

• Atom

• Molecule

• Compound

Tags

NGSS.MS-PS1-5

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

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.MS-PS1-2

What is the atomic mass of this atom?

• 1

• 3

• 4

• 7

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

Which element is a metalloid?

• Titanium

• Selenium

• Potassium

• Polonium

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

• 2.5

• 5

• 6

• 10.81

Tags

NGSS.MS-PS1-1

The atomic number of an element is determined by the _________ of ________ in the nucleus.

• protons, neutrons

• number, electrons

• electrons, protons

• number, protons

How many total atoms are in the product?

• 10

• 5

• 7

• 12

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed? 

• 28 g

• 4g

• 30g

• 12g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the atom diagram shown, E is pointing to

• An electron

• a proton

• a neutron

• the nucleus

Tags

NGSS.MS-PS1-1