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The mercury atoms in a fluorescent tube are excited and then emit photons in the ultraviolet region of the electromagnetic spectrum. Explain (i) how the mercury atoms become excited and (ii) how the excited atoms emit photons.

(i) As they pass through the fluorescent tube, they collide with the mercury atoms within it and this collision transfers energy to the atom. This energy transfer allows the atom's orbiti...

Answered by Evan H. • Physics tutor

25606 Views

Discuss the criminal liability of Mike

In this situation Mike would be charged with Murder.

Murder is a common law offence. It was defined by Sir Edward Coke as the unlawful killing of a living human being, under the queen’s peace, with...

Answered by Gurjant B. • Law tutor

9179 Views

How would one multiply out brackets?

If asked to multiply out a set of brackets, one must remember to multiply each term in a set of brackets by every term in the other set of brackets. For example, (x+2)(x-4) = x²+2x-4x-8 = x

Answered by Alden R. • Maths tutor

3842 Views

Describe and explain the electrical conductivity of lithium oxide, Li2O, and lithium in their solid and molten states.

Lithium conducts electricity in its solid and molten states. Lithium exhibits metallic bonding and as such its valence electrons are delocalised in the liquid and solid state allowing electricty to be con...

Answered by Charlie F. • Chemistry tutor

31596 Views