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Why can crude oil be separated by fractional distillation?

Crude oil is composed from hydrocarbons of varying chain length. Hydrocarbons with longer chains have higher boiling points due to the increasing strength of intermolecular forces with length, therefore t...

Answered by Charlotte F. • Chemistry tutor

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State the relative charge and relative mass of a proton, of a neutron and of an electron. In terms of particles, explain the relationship between two isotopes of the same element. Explain why these isotopes have identical chemical properties.

Proton: Relative Mass = 1, Relative Charge = +1Neutron: Relative Mass = 1, Relative Charge = 0Electron: Relative Mass = ~1/1870, Relative Charge = -1
Isotopes vary in the number of neutrons and there...

Answered by Edward P. • Chemistry tutor

10628 Views

Explain the physical properties of graphite in terms of its structure and bonding

Graphite is a giant covalent molecule. This means it has many atoms joined together by covalent bonds. Graphite consists of layers of carbon atoms joined together by

Answered by Eliza D. • Chemistry tutor

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Explain the trend in first ionisation energy along period 3

Going across a period there is generally an increase in first ionisation energy. This is because there are more protons in each nucleus leading to a greater positive charge and stronger electrostatic forc...

Answered by Jasmine D. • Chemistry tutor

2438 Views

Explain the trend of first ionisation energy down a group.

The first ionisation energy is the energy required to remove one electron from an atom. Down a group, there are more electron shells surrounding the nucleus, which results in a greater shielding from the ...

Answered by Rachael W. • Chemistry tutor

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