Chemistry Revision Questions C1a Topic 5

  1. Which of the following is correct?

    C) Neutrons are found in the nucleus of an atom.

    Electrons have a mass of 1/2000. Protons have a positive charge. Neutrons have no charge.
  2. Which of these describes the relation between the number of protons, neutrons and electrons?

    B) Number of protons = number of electrons and has no effect on the number of neutrons.

    This means that all atoms have no charge.
  3. An atom has an atomic number of 11 and an atomic mass of 23. How many neutrons does this atom have?

    C) 12

    The atomic number is the amount of protons and the atomic mass is the number of protons + the number of neutrons.
  4. What element was the last question referring to?

    C) Sodium

    Oxygen has an atomic number of 8, magnesium has an atomic number of 12 and helium has an atomic number of 2.
  5. Balance this equation: H2SO4 + NaOH --> Na2SO4 + H2O

    C) H2SO4 + 2NaOH --> Na2SO4 + 2H2O

    It is the only one where the number of atoms on each side is the same, and no atoms have been taken away.
  6. Who first arranged the elements in groups?

    B) Dmitri Mendeleev

    The other three don't exist.
  7. How many periods are there in the Periodic Table?

    C) 7

    There are eight groups and seven periods.
  8. What is another name for Group 7 in the Periodic Table?

    B) The Halogens

    The alkali metals are group 1, the transition metals have no group, they are the large part in the middle and the noble gases are group 0 or group 8.
  9. What is chlorine's physical state at room temperature?

    C) Green gas

    Fluorine is a yellow gas, bromine is a red/brown liquid and iodine is a grey solid.
  10. What colour are all noble gases at room temperature?

    C) They are colourless

    They emit light when electricity is shone through them.
Card Set
Chemistry Revision Questions C1a Topic 5
10 multiple choice questions.