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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 Atomic Structure
                is equal to the number of protons and the number of neutrons.
  1. Atomic number
  2. Ionic number
  3. Covalent number
  4. Atomic Mass
  5. Atoms
Grade 9 Periodic Table and Elements
What is the element symbol for chlorine?
  1. Ca
  2. Cu
  3. Cl
  4. Mg
  5. Sn
Grade 9 Periodic Table and Elements
What is the element symbol for potassium?
  1. K
  2. Ca
  3. Pb
  4. Sn
Grade 9 Atomic Structure
                are formed when an atom gains or loses electrons.
  1. Ions
  2. Atoms
  3. Electrons
  4. Protons
  5. Bonds
Grade 9 Atomic Structure
What does the octet rule state?
  1. Atoms become less stable with eight electrons in their outer energy level.
  2. Atoms become more stable with eight electrons in their outer energy level.
  3. Atoms will change their configurations and become a noble gas.
  4. Atoms will become more reactive and chemically bond with noble gases.
Grade 9 Atomic Structure
Which particles make up atoms?
  1. protons, neutrons, electrons
  2. protons, electrons, nuclei
  3. electrons, neutrons, ions
  4. neutrons, electrons, molecules
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
What is the element symbol for magnesium?
  1. K
  2. Fe
  3. Al
  4. Mg
Grade 9 Biochemical Pathways
C6H12O6+6O2→6CO2+6H2O+energy is the balanced chemical equation for which process?
  1. Photosynthesis
  2. Glycolysis
  3. Cellular respiration
  4. Krebs cycle
Grade 9 Biochemical Pathways
Which are typically products of cellular respiration?
  1. carbon dioxide and water
  2. oxygen and carbon dioxide
  3. water and glucose
  4. glucose and oxygen
Grade 9 Biochemical Pathways
Which are typically products of photosynthesis?
  1. oxygen and carbon dioxide
  2. glucose and oxygen
  3. carbon dioxide and water
  4. water and glucose
Grade 9 Biochemical Pathways
Which correctly describes the purpose of photosynthesis?
  1. to release energy by decomposing glucose
  2. to store energy in the form of carbon dioxide
  3. to use sunlight energy to make sugars
  4. to create water for hydration
Grade 9 Molecules and Compounds
O2-2 is named                .
  1. oxalate
  2. peroxide
  3. hydroxide
  4. hydronium
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