Chemistry Review

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

• Element
• Atom
• Molecule
• Compound

Tags

NGSS.HS-PS1-7

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

• electron cloud
• Space
• Nucleus
• Outside

Tags

NGSS.MS-PS1-1

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

What do isotopes of carbon all have in common?

• They all have the same number of neutrons & mass number

• They all have the same atomic number and number of neutrons

• They all have the same atomic number and number of electrons

• They all have the same number of protons and neutrons

Tags

NGSS.HS-PS1-8

What quantities vary between isotopes of an element?

• protons, electrons, and atomic mass

• protons, electrons, and atomic number

• neutrons and electrons

• neutrons and atomic mass

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H₂O --> __NaOH + __H₂

• 2,2 --> 2,1
• 4,4 --> 4,1
• 1,2 --> 2,4
• 1,2 --> 2,1

Tags

NGSS.MS-PS1-5

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?

__Ca + __H₂O --> __Ca(OH)₂ + __H₂

• 2,1 --> 2,1
• 1,2 --> 1,1
• 1,2 --> 2,4
• 1,2 --> 2,1

Tags

NGSS.MS-PS1-5