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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 Properties of Matter
A chemical change refers to                                                                               .
  1. a change in matter when matter independent changes form.
  2. a change in matter that does not change composition.
  3. a change in matter that leads to melting or evaporation.
  4. a change in matter that occurs when substances combine to form new substances.
Grade 9 Periodic Table and Elements
Grade 9 Atomic Structure
Why does an atom have no net electric charge?
  1. Its subatomic particles carry no electrical charge.
  2. The positively charged protons cancel out the negatively charged neutrons.
  3. The positively charged neutrons cancel out the negatively charged electrons.
  4. The positively charged protons cancel out the negatively charged electrons.
Grade 9 Matter
Grade 9 Periodic Table and Elements
Grade 9 Acids and Bases
Grade 9 Acids and Bases
Grade 9 Acids and Bases
Grade 9 Acids and Bases
Grade 9 Acids and Bases
A substance with a pH of 0 is a                .
  1. neutral
  2. strong acid
  3. strong base
  4. metal
  5. non-metal
Grade 9 Atomic Structure
Grade 9 Atomic Structure
Grade 9 Atomic Structure
Atoms become positively charged when it                 .
  1. shares electrons
  2. loses electrons
  3. loses protons
  4. gains electrons
  5. gains protons
Grade 9 Periodic Table and Elements
Grade 9 Periodic Table and Elements
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