D: SiO2
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X, Y and Z are three elements in the third period. • X reacts with chlorine to give a liquid product. • Y reacts with…
Complete the electronic configuration of a chromium atom. 1s²2s²2p⁶3s²
A solid Period 3 element, Q, is reacted with oxygen gas. Compound R is formed. When R is added to water the pH decrea…
Which radical is most likely to form by the homolytic fission of one covalent bond in bromochloromethane, CH₂BrCl?
Propene undergoes a variety of reactions. Which row is correct?
Polymerisation of ethene gives poly(ethene). How does the bonding between carbon atoms in poly(ethene) compare with t…