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6. What do they symbols: s, aq, and l mean?

  • Solid, aquarius, liquid.
  • Solid, aqueous (dissolved) liquid.
  • Structure, alignment, lining.

7. What is group 1?

  • Group one is The Alkali metals.
  • Group one is the noble gases.
  • Group one is the metals.

8. If there are 4 protons in an atom, how many electrons are there?

  • 4
  • 6
  • 8

9. What is spectroscopy used for?

  • To investigated the boiling point of an element.
  • The discovery of new elements.
  • To investigate the melting point of an element.

10. What is a vertical column in the periodic table called?

  • A group.
  • A period.
  • A column.

11. What does 'Exothermic' mean?

  • A chemical reaction that produces energy.
  • A chemical reaction that emits energy to its surroundings so that the products have less energy than the reactants.
  • A chemical reaction that absorbs energy from its surroundings so that the products have more energy than the reactants.

12. What happens to the physical properties of a group one element further down the group?

  • All of these.
  • The reactivity increases.
  • The melting point decreases.
  • The boiling point decreases.
  • The density increases.

13. What do Alkali metals react vigorously with to form white crystalline salts?

  • Chlorine.
  • Iodine.
  • Bromine.

14. What does a metal hydroxide dissolve into to create and alkaline solution?

  • Water.
  • Liquid.
  • Vinegar.

15. What are hazards identified by?

  • Lego people.
  • Hazard symbols.
  • Books.

16. What is Relative mass?

  • The total number of electrons and protons in an atom.
  • The total number of protons and neutrons in an atom.
  • The total number of protons in an atom.

17. What is the relative mass and charge of a proton?

  • 1= -1
  • 1= +1
  • 0

18. What happens when Lithium, potassium and sodium react with water?

  • They float (due to their low density.) and they produce bubbles of hydrogen gas.
  • They produced a white substance.
  • All of these.

19. What can Alkali metals react to form?

  • Compounds.
  • Elements.
  • Atoms.

20. What are the common safety precautions taken for hazardous chemicals?

  • Using small amounts of hazardous chemicals and low concentrations.
  • Not eating or drinking when working with chemicals.
  • Using safety screens.
  • Working in a fume cupboard or ventilating the room.
  • Wearing gloves and eye protection.
  • Not using flammable substances near to naked flames.
  • All of these.
  • Washing hands after dealing with hazardous chemicals.