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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 thresh...
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Answered by Samuel C. • Chemistry tutor
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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 becomes...
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Answered by Rachel S. • Chemistry tutor
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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
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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
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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 tw...
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Answered by Kym A. • Chemistry tutor
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