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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 therefore var...
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Answered by Edward P. • 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 force o...
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Answered by Jasmine D. • Chemistry tutor
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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 nuc...
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Answered by Rachael W. • Chemistry tutor
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How does Le Chatelier's Principle allow you to predict the change of the position of equilibrium for an equilibrium reaction?

Le Chatelier's principle states that the position of equilibrium will shift to oppose the change of conditions to a system. For example, if the temperature is increased the position of equilibrium will shift...
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Describe the structure of silicon dioxide

A giant macromolecular covalent structure with a high melting point and covalent intramolecular bonds between all atoms.
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Answered by Rohan K. • Chemistry tutor
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