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Fundamentals of chem

GCSE chemistry and combined chemistry

QuestionAnswer
Define atom The smallest part of an element that can still be recognised as that element
Define element A substance made of only one type of atom
Define compound A substance made of two or more different atoms chemically bonded together
Define molecule A substance made of more than one atom chemically bonded together (can be atoms of the same type!)
What is the formula of the hydroxide ion? OH-
What is the formula of the sulphate ion? SO42-
What is the formula of the nitrate ion? NO3-
What is the formula of the group 1 metal ions? Li+, Na+, K+
What is the formula of the group 2 metal ions? Be2+, Mg2+, Ca2+
What is the formula of the oxide ion? O2-
What is the formula of the ammonium ion? NH4+
What does this hazard symbol indicate? Corrosive
What does this hazard symbol indicate? Environmental hazard
What does this hazard symbol indicate? Toxic
What does this hazard symbol indicate? Irritant
What does (aq) stand for? Aqueous: when something is dissolved in water. E.g. NaCl(aq) is salt water
What does (s) stand for? solid
What does (l) stand for? liquid
What does (g) stand for? Gas
What safety measures should you use if a practical produces a toxic gas? Use a fume cupboard
Created by: JBearfield
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