A small quantity of solid ammonium chloride (NH4Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone
Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,
Given the above is the electronic arrangement of PQRS elements, Q will form an electrovalent bond with S
Further explanation was provided by our student by name (Odebiyi Dare D-cent) via our facebook page. Thus he says:
without argument, D is the answer cos electrovalent involves the transfer of electron. Alreadily, Q is 11 with elect configuratn of 2,8,1, i.e havin 1 valency electron whch is ready to be loss by that atom of element Q, also, S is 17, with ele cnfi
- Alkaline solutions of pyrogallol absorb oxygen efficiently. - Quicklime have a strong chemical affinity to absorb water. - At room temperature, Calcium oxide (CaO) will spontaneously absorb carbon dioxide from the atmosphere.