D: ¹⁶O²⁻
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Which ion has both more electrons than protons and more protons than neutrons? [H = ¹H; D = ²H; O = ¹⁶O]
Which species contains the smallest number of electrons?
Which ion has the same electronic configuration as Cl¯?
Sea water contains about 20gdm-³ of chloride ions, Cl-(aq). The exact concentration of Cl-(aq) in sea water can be de…
Crystals of copper(II) nitrate are prepared by adding an excess of malachite to nitric acid. The formula of malachite…
X and Y are elements from the same group of the Periodic Table. The 5th to 9th ionisation energies for X and Y are sh…