1. Expla
2. State four hazards encountered at school.
3. Explain why toxic chemicals are classified as hazard.
4. Give two reasons why fuel tankers have warning and safety signs pasted at their back.
5. State five safety precautions against accidents on our roads.
6. (a) What is protective clothing?
(b) Give three examples of protective clothing and state what each does.
7. Explain why hazards are dangerous.

If a || b and e || f, what is the value of y ?

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what