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8th - Unit 1 Lesson 2 Periodic Table

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  • If an element has 11 protons, what is the element?
    Sodium (Na)
  • What are valence electrons?
    The electrons in the outermost energy level of an atom
  • Which element has the symbol K?
    Potassium
  • What number tells you how many protons are in an atom?
    Atomic Number
  • What does the atomic mass tell you?
    Protons + neutrons
  • What are the horizontal rows on the periodic table called?
    Periods
  • How many periods are there on the periodic table?
    7
  • What happens to atomic number as you move left to right across a period?
    It goes up by 1.
  • Where are the nonmetals found?
    on the right side
  • What is the atomic mass of Carbon (C)?
    12.01
  • What group contains the most reactive metals?
    Group 1 Alkali Metals
  • Which element has atomic number 26 and is known as a strong metal used in construction?
    Iron
  • Which element is in Period 3, Group 16?
    Sulfur
  • An element with 8 protons belongs to which period and group?
    Period 2, Group 16 (Oxygen)
  • What happens to reactivity of metals across a period?
    It decreases
  • What does the period number tell you?
    How many energy levels (shells) the atom has.
  • Which side of the periodic table are metals found on?
    Left Side
  • What are the vertical columns called?
    Groups/Families
  • Who created the first periodic table?
    Dmitri Mendeleev
  • What is the smallest particle of an element that still has the properties of that element?
    Atom