Summer 2025 Chemistry B #1

Substances that are present at the start of a chemical reaction and transform into new substances.

• Reactant

• Product

• Closed system

• Open system

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A substance that is formed as a result of a chemical reaction.

• Reactant

• Product

• Closed system

• Open system

Tags

NGSS.MS-PS1-2

Which of these particles has a positive charge?

• Proton

• Neutron

• Electron

• Atom

 Finish this statement: Neutral atoms of all of the isotopes of the same element have

• different numbers of protons.

• equal numbers of neutrons.

• 1. the same number of electrons.

• 1. the same mass numbers.

Finish the following statement: The valence electrons of representative elements are _____

• 1. in s orbitals only.

• 1. located in the innermost occupied shell.

• located closest to the nucleus.

• 1. located in the outermost occupied major energy level.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

 Which of these elements/symbols doesn't match?

• Uranium/ U

• Sulfur/ S

• Iron/ I

• Potassium/ K

What is the chemical symbol for Manganese?

• 1. Ma

• Mo

• 1. Mg

• Mn

There is a cube that is 1.2 centimeters on the side. It has a mass of 36 grams. What is the density in g/cm3?

• 43.2

• 62.2

• 20.8

• 30

The measurement or determination of the amount or quantity of a substance

•  Reactant

• Quantitative Data

• Qualitative Data

•  System

Descriptive info about a substance or reaction that is not expressed numerically

• Quantitative Data

• Product

  
  

• Qualitative Data

• System