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Chemistry Practice (Units 1 and 2)

Quiz by Erin Durante

Grade 8
Science (2017)
Texas Essential Knowledge and Skills (TEKS)

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19 questions
Show answers
  • Q1
    What are the reactants in the following chemical equation? 2Na + MgF2 ---> 2NaF + Mg
    2Na + MgF2
    2NaF
    2NaF + Mg
    2Na
    60s
  • Q2
    What are the products in the following chemical equation? 2Na + MgF2 ---> 2NaF + Mg
    2NaF
    2Na + MgF2
    2NaF + Mg
    Mg
    60s
  • Q3
    What represents a single atom?
    2K
    Na
    O2
    2Na
    60s
  • Q4
    The things that we use to cause a chemical reaction are
    to the left of the arrow, called products
    to the right of the arrow, called products
    to the left of the arrow, called reactants
    to the right of the arrow, called reactants
    60s
  • Q5
    What is the Law of Conservation of Mass?
    The hydrogen atoms have to be at least 4
    The oxygen atoms have to be at least 4
    The reactants must have the same number of atoms of each element as the products.
    The number of atoms have to be equal on both sides of the equation, but the elements can be different
    60s
  • Q6
    Which is an example of evidence of a chemical change?
    Precipitate
    Evaporation
    Melting
    Dissolving
    60s
  • Q7
    The Periodic Table is arranged in order of
    Atomic Mass
    Number of Neutrons
    Atomic Number
    Alphabetical
    60s
  • Q8
    Oxygen is classified as
    A metalloid with an atomic number of 8
    A metalloid with an atomic number of 16
    A nonmetal with an atomic number of 8
    A nonmetal with an atomic number of
    60s
  • Q9
    What is an atom?
    The smallest part of matter with neutrons and electrons making up the core, surrounded by protons.
    The smallest part of matter with protons and neutrons making up the core, surrounded by electrons.
    The smallest part of matter with protons and neutrons making up the core, and ions surrounding it.
    The smallest part of matter with protons and electrons making up the core, surrounded by neutrons.
    60s
  • Q10
    An atom with 6 protons is
    Carbon
    Oxygen
    Helium
    Lithium
    60s
  • Q11
    Which subatomic particle IDENTIFIES the atom?
    Electrons
    Protons
    Neutrons
    Nucleus
    60s
  • Q12
    Which subatomic particle determines REACTIVITY?
    All Electrons
    Protons
    Neutrons
    Valence electrons
    60s
  • Q13
    When an atom is neutral, it has the same number of
    Protons, Neutrons, and Electrons
    Protons and Neutrons
    Neutrons and Electrons
    Protons and Electrons
    60s
  • Q14
    Elements have the same chemical properties when
    they have the same atomic number
    they are in the same column, or group
    they are in the same row, or period
    they have the same mass
    60s
  • Q15
    A group on the Periodic Table has
    the same number of valence electrons
    the same number of neutrons
    the same number of energy levels
    the same mass
    60s

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