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a) Describe the nature of ionic bonding. b) State the electron configuration of the Ca (II) ion. c) Outlie why solid calcium is a good conductor of electricity.

a) Ionic bonding is the electrostatic attraction between oppositely charged ions (+ and -). [1]b) 1s²2s²2p⁶3s²3p⁶ [1]c) Metallic bonding occurs throu...

Answered by Hristo S. • Chemistry tutor

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Let f(x) = px^2 + qx - 4p, where p is different than 0. Showing your working, find the number of roots for f(x) = 0.

Δ = b² - 4ac = q² - 4p (-4p) = q² + 16p²p different than 0 => 16p² greater than 0 onlyq² greater or equal to 0q² + ...

Answered by Hristo S. • Maths tutor

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Explain the roles of specific enzymes in prokaryote DNA replication. [7 marks]

DNA replication is the same in eukaryotes and prokaryotes; the question just emphasizes that the process depends on enzymes and their functions need to be explained.DNA gyrase (o...

Answered by Hristo S. • Biology tutor

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Quel est le rôle de la famille dans les oeuvres que vous avez étudiées?

À première vue, la question de la famille n'est pas une idée evident dans le film, Intouchables (2011), toutefois ça devient essentielle pour le personnage principal et sa perspective de son mortalité et ...

Answered by Felicity A. • French tutor

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Describe blood circulation from the heart to the rest of the body

Deoxygenated blood reaches the heart and enters into the right atrium. Pressure in the right atrium increases which causes the right atrioventricular valve to open allowing the passing of the blood into t...

Answered by Phaedra T. • Biology tutor

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