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In terms of Electrostatic Forces, Suggest why the ‘Electron Affinity’ of Fluorine has a Negative value.

Electron affinity is the energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous 1- ions. Fluorine has a negative value as energy is released when the electron is gain...
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Answered by Arthur G. • Chemistry tutor
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Describe the Difference Between ‘Faults’ and ‘Joints’ in Rocks.

Whereas faults have relative movement, joints have no movement. This means that although faults show displacement (such as displaced bedding), joints show no displacement.
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Answered by Arthur G. • Geology tutor
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Explain how Earthquakes Occur when Stress Stored in Rocks is Released.

Earthquakes occur when the stored stress in the rock exceeds its strength. Energy is released as the rocks fractures and moves in the form of seismic waves. The energy released causes vibrations creating gro...
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Answered by Arthur G. • Geology tutor
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State and explain two adaptations of a red blood cell?

Red blood cells have a biconcave disk shape, meaning that it increases their surface area and allows for more rapid diffusion of oxygen into and out of the cell. Red blood cells do not have a nucleus so they...
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Answered by Joe D. • Biology tutor
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Write a balanced chemical symbol equation for a reaction between Potassium and Water, including state symbols?

2K(s) + 2H 2 O(l) = 2KOH(aq) + H 2 (g) Potassium (K) is a group 1 metal, which is a solid. Water (H 2 O) reacts with Potassium to form Potassium Hydroxide (KOH) and Hydrogen (H 2 ). Hydrogen exists naturally...
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Answered by Joe D. • Chemistry tutor
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