3. Write the chemical formula for compounds formed by the following combinations of elements. (a) Magnesium and fluorine (b) Potassium and oxygen (c) Carbon and oxygen (d) Carbon and hydrogen (e) Carbon and chlorine (f) Beryllium and sulfur (g) Silicon and oxygen (h) Aluminium and fluorine (i) Aluminium and oxygen.
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Thinking and Investigating 1. Katie received an email offering her the chance to buy sodium that had been collected
from a riverbed. How did Katie know that the email was spam?
2. Explain the science behind this joke: Helium walks into a café. The waiter says, ‘I am sorry, we don’t serve noble gases.’ Helium doesn’t react.
3. Carbon has four electrons in its outer shell. Carbon shares these four electrons when it forms compounds. This allows carbon to make some large and complex molecules when chains or rings of carbons join together. Find out about three different compounds that are formed from chains or rings of carbon and draw a molecule of each.
