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electron arrangement in atoms

Work out what they know

how are shells arranged?

how do electrons arrange themselves within the shells?

how many electrons per shell?

types of shells

how to write the a...

Answered by Lucy N. • Chemistry tutor

1691 Views

In the addition of hydrogen bromide to propene, consider which of the two possible products, 1-bromopropane and 2-bromopropane, will be the major product and why.

[Throughout the question, references will be made to a diagram which shows the mechanism of the reaction] In organic addition reactions like the one described in the question, an unstable intermediate car...

Answered by Aryan N. • Chemistry tutor

13982 Views

Explain why increasing the temperature of a reaction increases the rate of the reaction (2)

By raising the temperature of the reaction mixture, the particles have more (kinetic) energy and so move around at a greater rate. This means there are more frequent collisions, due to the increased speed...

Answered by Sam H. • Chemistry tutor

2116 Views

Calculate the mass of sodium amide needed to obtain 550 g of sodium azide, assuming there is a 95.0% yield of sodium azide. Give your answer to 3 significant figures.

2NaNH2 + N2O --> NaN3 + NaOH + NH3

Mr(NaN3) = 65 Mr(NaNH2) = 39
n(NaN3) = 550/65 = 8.46
100% NaN3 = 550/65 x 100/95 = 8.91
n(NaNH2) = 2 x 8.91 = 17.8
m(NaNH2) = 17....

Answered by Kathleen M. • Chemistry tutor

13363 Views

What is the difference between ionic and covalent bonding?

Covalent bonding is the sharing of a pair of electrons between atoms to make molecules e.g. CO₂, whereas Ionic bonding is the transfer of electrons from one atom to the other to m...

Answered by Natalie S. • Chemistry tutor

2077 Views