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Group 7

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.HS-PS1-1, NGSS.HS-PS1-2 · England: GCSE Combined Science: Atomic structure and the periodic table (group 7)

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  1. Question 1

    The halogens: which statement is true?

    • A. Iodine is more reactive than chlorine.
    • B. Boiling points of halogens decrease down the group.
    • C. Fluorine is the most reactive halogen.
    • D. Halogens are found as single atoms.

  2. Question 2

    Which halogen is a red-brown liquid at room temperature?

    • A. fluorine
    • B. chlorine
    • C. bromine
    • D. iodine

  3. Question 3

    Chlorine water is added to potassium bromide solution. Will a reaction happen?

    • A. yes: chlorine displaces bromine
    • B. no reaction

  4. Question 4

    The halogens: which statement is true?

    • A. Boiling points of halogens decrease down the group.
    • B. Halogens are found as single atoms.
    • C. Iodine is more reactive than chlorine.
    • D. Halogens have seven electrons in their outer shell.

  5. Question 5

    Halogens exist as molecules. What is the formula of a chlorine molecule?

    • A. Cl⁻
    • B. Cl₂
    • C. Cl
    • D. Cl₃

  6. Question 6

    Chlorine water is added to potassium iodide solution. Will a reaction happen?

    • A. yes: chlorine displaces iodine
    • B. no reaction

  7. Question 7

    The halogens: which statement is true?

    • A. Halogens are found as single atoms.
    • B. Boiling points of halogens decrease down the group.
    • C. Halogens react with metals to form salts.
    • D. Iodine is more reactive than chlorine.

  8. Question 8

    Why does reactivity decrease down group 7?

    • A. Halogens are metals
    • B. The atoms have fewer outer electrons
    • C. The atoms lose electrons more easily
    • D. The outer shell is further from the nucleus, so gaining an electron is harder

  9. Question 9

    Chlorine water is added to potassium bromide solution. Will a reaction happen?

    • A. yes: chlorine displaces bromine
    • B. no reaction

  10. Question 10

    The halogens: which statement is true?

    • A. Fluorine is the most reactive halogen.
    • B. Boiling points of halogens decrease down the group.
    • C. Halogens are found as single atoms.
    • D. Iodine is more reactive than chlorine.

  11. Question 11

    Which halogen is a red-brown liquid at room temperature?

    • A. chlorine
    • B. bromine
    • C. fluorine
    • D. iodine

  12. Question 12

    Chlorine water is added to potassium bromide solution. Will a reaction happen?

    • A. yes: chlorine displaces bromine
    • B. no reaction

  13. Question 13

    The halogens: which statement is true?

    • A. Halogens are found as single atoms.
    • B. Boiling points of halogens decrease down the group.
    • C. Fluorine is the most reactive halogen.
    • D. Iodine is more reactive than chlorine.

  14. Question 14

    Why does reactivity decrease down group 7?

    • A. The atoms lose electrons more easily
    • B. The outer shell is further from the nucleus, so gaining an electron is harder
    • C. Halogens are metals
    • D. The atoms have fewer outer electrons

  15. Question 15

    Bromine water is added to potassium chloride solution. Will a reaction happen?

    • A. yes: bromine displaces chlorine
    • B. no reaction

  16. Question 16

    The halogens: which statement is true?

    • A. Halogens react with metals to form salts.
    • B. Halogens are found as single atoms.
    • C. Iodine is more reactive than chlorine.
    • D. Boiling points of halogens decrease down the group.

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  1. Fluorine is the most reactive halogen.
  2. bromine
  3. yes: chlorine displaces bromine
  4. Halogens have seven electrons in their outer shell.
  5. Cl₂
  6. yes: chlorine displaces iodine
  7. Halogens react with metals to form salts.
  8. The outer shell is further from the nucleus, so gaining an electron is harder
  9. yes: chlorine displaces bromine
  10. Fluorine is the most reactive halogen.
  11. bromine
  12. yes: chlorine displaces bromine
  13. Fluorine is the most reactive halogen.
  14. The outer shell is further from the nucleus, so gaining an electron is harder
  15. no reaction
  16. Halogens react with metals to form salts.