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Structure of matter

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  • What is cytoplasm in terms of mixtures?
    A compound
    A heterogeneous mixture
    An element
    A solution in cells
  • How many known elements are there?
    About 120
    About 75
    About 50
    About 200
  • What is an element?
    A type of mixture
    Substance made of molecules only
    Substance made of one type of atom
    Substance made of two atoms
  • What are the two categories of pure substances?
    Molecules and atoms
    Solids and liquids
    Mixtures and solutions
    Elements and compounds
  • Where are protons and neutrons located?
    In the electron cloud
    Outside the atom
    In the nucleus
    In mixtures
  • What is sodium chloride (NaCl)?
    A poisonous gas
    Water
    A reactive metal
    Table salt
  • What is a mixture?
    A type of element
    A molecule
    Combination of substances not chemically bonded
    A pure substance
  • Where are electrons found?
    In the cytoplasm
    Around protons
    In the electron cloud
    Inside the nucleus
  • What type of mixture is blood plasma?
    Heterogeneous mixture
    Element
    Solution
    Compound
  • What charge do protons have?
    Positive
    Neutral
    No charge
    Negative
  • What happens when charges are opposite?
    They attract
    They repel
    They disappear
    They neutralize
  • What charge do neutrons have?
    No charge
    Positive
    Negative
    Double negative
  • What is a heterogeneous mixture?
    Always a solid
    Unevenly mixed substance
    Always a liquid
    Evenly mixed substance
  • What is a homogeneous mixture?
    Unevenly mixed substance
    Evenly mixed substance
    Always a gas
    Liquid only
  • What is matter?
    Only things visible
    Anything with mass and volume
    Only liquids
    Only things that are alive
  • What ion is present in bases?
    Hydrogen ion (H⁺)
    Oxygen ion (O²⁻)
    Calcium ion (Ca²⁺)
    Hydroxide ion (OH⁻)
  • What are the two types of mixtures?
    Homogeneous and heterogeneous
    Solutions and solids
    Acids and bases
    Elements and compounds
  • What ion is present in acids?
    Hydroxide ion (OH⁻)
    Hydrogen ion (H⁺)
    Sodium ion (Na⁺)
    Chloride ion (Cl⁻)
  • What is a compound?
    Energy form
    Any mixture of elements
    Single atom substance
    Substance of two or more elements chemically combined
  • What is the smallest unit of a compound?
    A molecule
    An atom
    A proton
    An ion
  • What is a solution?
    An element
    A heterogeneous mixture
    Homogeneous mixture with tiny dissolved particles
    Any pure substance
  • What is a pure substance?
    Matter without atoms
    Any living thing
    Matter with constant composition
    Mixture of elements
  • What charge do electrons have?
    Zero
    Positive
    Neutral
    Negative
  • What does H₂O represent?
    Oxygen gas
    Carbon dioxide
    Hydrogen gas
    Water
  • What type of mixture is ocean water?
    Element
    Solution
    Heterogeneous mixture
    Compound
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