chemistry revision

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What is the equation for RFM?
RFM = Mass / Moles
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what is the equation for % atom economy?
%atom economy = ( Total mass of useful products / total mass of reactants ) x100
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Who created the plum pudding model?
J J Thompson
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What is the gold foil experiment?
A piece of gold foil was hit with alpha particles, which have a positive charge. Most alpha particles went right through. This showed that the gold atoms were mostly empty space. Some particles had their paths bent at large angles. meaning that they were
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what is a halogen?
Any element in group 7 (e.g flourine, chlorine, bromine, iodine and astatine).
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what is ionic bonding?
it is the intermolecular bond between a positively charged metal and a negatively charged non-metal. (e.g NaCl)
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What happens during ionic bonding?
An ionic bond is formed by the complete transfer of some electrons from one atom to another. The atom losing one or more electrons becomes a cation—a positively charged ion. The atom gaining one or more electron becomes an anion—a negatively charged ion.
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Name 3 properties of graphite and why?
Smooth and slippery due to the atoms being structured in layers.
good conductor of electricity due to every carbon carbon atom bonding with 3 others, leaving 1 delocalised electron per atom.
It has a high melting point due to the strong covalent bonds tha
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What is covalent bonding?
A chemical bond formed when electrons are shared between two atoms. Usually each atom contributes one electron to form a pair of electrons that are shared by both atoms ( e.g H2O).
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Card 2

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what is the equation for % atom economy?

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%atom economy = ( Total mass of useful products / total mass of reactants ) x100

Card 3

Front

Who created the plum pudding model?

Back

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Card 4

Front

What is the gold foil experiment?

Back

Preview of the front of card 4

Card 5

Front

what is a halogen?

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