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8th Grade - Atomic Structure and The Periodic Table

Quiz by Sarah Cameron

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30 questions
Show answers
  • Q1
    An electron is best described as a subatomic particle that ...
    makes up the majority of an atom's volume and has a negative charge.
    makes up the majority of an atom's mass and has a positive charge.
    makes up the majority of an atom's mass and has a negative charge.
    makes up the majority of an atom's volume and has a positive charge.
    30s
  • Q2
    The majority of the atomic mass of an atom is is composed of ...
    Protons and Neutrons
    Protons only
    Protons and Electrons
    Neutrons and Electrons
    30s
  • Q3
    An element's identity is defined by the number of which subatomic particle contained in it's atoms?
    Nucleus
    Neutrons
    Protons
    Electrons
    30s
  • Q4
    An atom's Atomic number is equal to ...
    it's number of protons and electrons.
    it's number of protons and neutrons.
    it's number of neutrons and electrons.
    it's atomic mass.
    30s
  • Q5
    Which subatomic particles reside in the atom's nucleus?
    Protons and Electrons
    Neutrons and DNA
    Electrons and Neutrons
    Neutrons and Protons
    30s
  • Q6
    Which subatomic particles orbit the nucleus in a cloud?
    Electrons
    Protons
    Mass
    Neutrons
    30s
  • Q7
    How many neutrons does Magnesium contain?
    24
    11
    12
    13
    30s
  • Q8
    How many neutrons does Selenium contain?
    45
    79
    34
    44
    30s
  • Q9
    How many neutrons does Argon have?
    21
    40
    18
    22
    30s
  • Q10
    A neutron has a _______________ charge.
    Positive
    Neutral
    Full
    Negative
    30s
  • Q11
    Which of the following atoms has a greater level of reactivity than Aluminum?
    Magnesium
    Helium
    Boron
    Silicon
    30s
  • Q12
    Which subatomic particle determines an atom's level of reactivity?
    Number of protons
    Number of valence electrons
    Mass number
    Number of neutrons
    30s
  • Q13
    Which element is less reactive than Nitrogen?
    Phosphorus
    Beryllium
    Oxygen
    Carbon
    30s
  • Q14
    Which element's atoms has three energy levels and six valence electrons?
    Phosphorus
    Sulfur
    Oxygen
    Selenium
    30s
  • Q15
    Which element is not classified as a metalloid?
    Aluminum
    Arsenic
    Silicon
    Boron
    30s

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