James picks up a brittle black solid that he calls element Z. He notes that it can conduct heat and electricity and that it is often used to make fires for cooking or heating. It can
also be found in another form, a clear solid that is very hard. This form of Z is often
used in fine jewellery. It does not react with acids.
a) ls element Z a metal or a non-metal? Give a reason for your answer.
b) Identify element Z.
c) Explain why element Z can be found as a brittle black solid, and a colourless hard
solid if it is the same element.​

Geothermal energy for industrial use is available almost anywhere. a.true b.false

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.