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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 Bonds and Mixing
A covalent bond forms when which occurs?
  1. opposite ions attract
  2. protons are shared between atoms
  3. an electron is transferred from one atom to another
  4. two atoms share a pair of electrons
Grade 9 Solvents, Solutes, and Solubility
When a solution can dissolve no more solute because it is at its maximum solute level, how can that solution be described?
  1. unsaturated
  2. saturated
  3. supersaturated
  4. concentrated
Grade 9 Bonds and Mixing
What type of mixture would you describe pizza as?
  1. Homogeneous
  2. Heterogeneous
  3. solution
  4. compound
Grade 9 Molecules and Compounds
What are common characteristics of metallic bonds?
  1. Valence shells of atoms overlap; an electron sea.
  2. They do not contain electrons.
  3. Only protons and neutrons are present.
  4. None of the above.
Grade 9 Biochemical Pathways
In the presence of oxygen, one glucose molecule has sufficient energy to produce up to                 .
  1. 4 NADH molecules
  2. 12 FAD molecules
  3. 38 ATP molecules
  4. all of the above
Grade 9 Macromolecules
Hormones such as testosterone and adrenaline are included in what group of organic molecules?
  1. amino acids
  2. carbohydrates
  3. lipids
  4. nucleic acids
  5. proteins
Grade 9 Nuclear Chemistry
Uranium causes what?
  1. "fission" to occur when hit with neutrons
  2. "fusion" to occur when hit with neutrons
  3. "evaporation" to occur when hit with a proton
  4. "evaporation" to occur when hit with an electron
Grade 9 Atomic Structure
Who discovered neutrons?
  1. Sir Rutherford
  2. Sir James Chadulick
  3. Artstotle
  4. Archimedes
Grade 9 Macromolecules
A macromolecule that forms when molecules called nucleotides join together in a long chain is a
  1. protein.
  2. nucleic acid.
  3. carbohydrate.
  4. lipid.
Grade 9 Periodic Table and Elements
All atoms of the same element contain the same number of what?
  1. Neutrons
  2. Protons
  3. Neutrons and electrons
  4. Neutrons and protons
Grade 9 Acids and Bases
When an acid dissolves almost completely in water, it is called which of the following?
  1. weak acid
  2. strong acid
  3. weak base
  4. strong base
Grade 9 Periodic Table and Elements
Which of the following best defines an element?
  1. a pure substance composed of a single type of atom
  2. a pure substance with a particular set of properties
  3. a mixture composed of 2 simple substances
  4. a homogeneous mixture with minute particles
  5. a substance made by chemically bonding 2 different substances
Grade 9 Properties of Matter
Which of these is true about density?
  1. Density is directly related to volume and inversely related to mass.
  2. Density is directly related to mass and inversely related to volume.
  3. Density has relationship to volume, but depends on mass.
  4. Density has no relationship to mass, but depends on volume.
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