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Explain why the atomic radius of elements decreases as you move across the periodic table from the left to the right

Periodicity:As you move across the row the atomic number increases, ie an additional proton is added for each additional element, this is what makes them different elements rather than isotopes of the same e...
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Explain why cis- alkenes typically have a lower boiling point than trans alkenes.

Define cis and trans alkenes: Carbon to carbon single bonds can freely rotate to give a carbon chain that can take on a number of shapes (this is to do with the overlap of p - orbitals to form pi bonds) howe...
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describe in terms of electrons what happens when magnesium oxide is formed from magnesium and oxygen atoms?

Magnesium in a metal, whereas oxygen is a non metal - therefore magnesium oxide is formed by an ionic bond (if it were 2 non metals it would be a covalent bond). It is important to understand that atoms pref...
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Answered by Maaedah K. • Chemistry tutor
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How can you distinguish between an endothermic reaction and an exothermic reaction based on temperature change of the surroundings.

In an exothermic reaction, energy is released from the system and into the surroundings, the system loses energy so the surroundings gain energy. The surroundings gain energy as heat and therefore there is a...
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Answered by Kuba S. • Chemistry tutor
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Why does ozone absorb a broader range of wavelengths of UV light than oxygen?

Covalent molecules such as oxygen and ozone absorb different ranges of UV light mainly due to differences in the types of bonds that make up their structure. It is therefore useful to first consider the Lewi...
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Answered by Eleanor S. • Chemistry tutor
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