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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?
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?
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?
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.