Chemistry 1st Semester Exam

Which state of matter has a definite volume and takes the shape of its container?

• solid

• liquid

• gas

• 1. both b and c

  
  

How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain?

• 50 protons, 50 electrons, 75 neutrons

  
  

• 75 electrons, 50 protons, 50 neutrons

  
  

• 120 neutrons, 50 protons, 75 electrons

  
  

• 1. 70 neutrons, 75 protons, 50 electrons

  
  

Tags

NGSS.MS-PS1-1

Which state of matter takes both the shape and volume of its container?

• solid

• liquid

  
  

• gas

• 1. both b and c

  
  

Which state of matter is characterized by having a definite shape and a definite volume?

• gas

• liquid

• solid

• 1. all of the above

  
  

Which of the following is a physical change?

• corrosion

• explosion

  
  

• evaporation

• 1. rotting of food

  
  

A substance that can be separated into two or more substances only by a chemical change is a(n) ____.

• solution

• element

  
  

• mixture

• compound

Tags

NGSS.MS-PS1-5

The chemical symbol for iron is ____.

• CL

• NA

• FE

• H

The chemical formula of a compound does NOT indicate the ____.

• identity of the elements in the compound

• how elements are joined in the compound

  
  

• the composition of the compound

  
  

• 1. relative proportions of the elements in the compound

  
  

What do chemical symbols and formulas represent, respectively?

• elements and compounds

  
  

• atoms and mixtures

  
  

• compounds and mixtures

  
  

• 1. elements and ions

  
  

Which of the following is a chemical property?

• color

  
  

• hardness

  
  

• freezing point

  
  

• 1. ability to react with oxygen