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Chemistry
GCSE

what is a catalyst

A substance that increases the rate of a reaction without having been used up itself in the reaction. They function by providing a lower activation energy for the reaction to begin, which is a type of thr...

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Answered by Samuel C. Chemistry tutor
1901 Views

Explain the difference between covalent and ionic bonding.

In covalent bonding 2 or more atoms share electron in their outter shells to give them all full outer shells. In ionic bonding one atom donates one or more electons to another atom, the donating atom beco...

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Answered by Rachel S. Chemistry tutor
2279 Views

What is an ionic bond?

An ionic bond is the electrostatic force of attraction between two or more oppositely charged ions, formed by the transfer of electrons...

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Answered by Gunchit S. Chemistry tutor
2125 Views

Describe what happens when two atoms of potassium react with one atom of sulfur giving your answer in terms of electrons.

Electrons are transferred from potassium to sulfur. Two potassium atoms each lose one electron forming K+ / 1+ ions. Sulfur atoms gain 2 electrons forming S2- / 2- ions.

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Answered by Sabrine H. Chemistry tutor
4423 Views

Explain, with reference to the outer electrons, the type of bonding in sodium chloride and whether it would be a good conductor of electricity.

Because sodium chloride is a compound that consists of a metal and a non-metal, we know that the bonding present in sodium chloride is ionic. This means that electrons are given and taken in order for the...

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Answered by Kym A. Chemistry tutor
5407 Views

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