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An isotope is an atom of the same element, but with a different number of neutrons. Hence, it has the same atomic number but a different mass number.

The general trend observed is that ionisation energies increase from left to right across the periodic table. There are 3 primary factors in determining ionisation energies: 1.) Atomic radius- the smaller...

The energy required to remove an electron from 1 mole of gaseous atoms to form 1 mole of gaseous 1+ ions

Benzene's delocalised π system of electrons makes it not quite electron rich enough for the reaction to take place. The lone pair from the -OH group in phenol adds enough electron density into the ring so...

Balanced equation: H₂SO₄ + 2NaOH → 2H₂O + Na₂SO₄moles of NaOH = c x v = 0.1 mol dm^-3 x (20/1000) dm³ = 0.002 molStoichiometry: ...