Top answers

How would you prove that a substance contains magnesium ions?

Add sodium hydroxide solution to the substance and if a white precipitate is observed that does not dissolve in excess sodium hydroxide then there are magnesium ions in the substance.
RC
Answered by Rachel C. • Chemistry tutor
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Why does silver have a high melting point?

Silver contains strong metallic bonds (a lattice of positive ions surrounded by a sea of delocalised electrons) which require large amounts of energy to break, therefore has a high melting point.
RC
Answered by Rachel C. • Chemistry tutor
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Which has a lower boiling point chlorine or bromine, and why?

Chlorine has a lower boiling point as it is smaller in size than bromine. Chlorine has fewer electrons than bromine and fewer electron shells so chlorine is smaller in atomic radius. Size affects the strengt...
GF
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There are two methods of ionisation in a time of flight spectrometer, name and explain one of these methods in detail.

1).Electron impact ionisation- in this types of ionisation the sample is vaporised and injected into the mass spectrometer, then high energy electrons are fired at this sample from an electron gun. This knoc...
NH
Answered by Nadia H. • Chemistry tutor
5106 Views

How many electrons are in a chloride ion Cl- and how are they arranged in the shells? a periodic table can be used.

18 total2,8,8(2,8,7 in chlorine atom, one more from another atom to form the negative charge and filling the third shell)
MM
Answered by Melissa M. • Chemistry tutor
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