by Sunday | Sep 25 | NABTEB QUESTIONS
Solutions. Sodium ion, Na+, electronic configuration = 1s² 2s² 2P6 Neon atom Ne, electronic configuration = 1s² 2s² 2P6 Sodium ion Na+ is like with neon atom Ne for each has 10 electrons OR has the same electronic configuration.
by Sunday | Sep 25 | NABTEB QUESTIONS
1. State the composition of the nucleus. 2. Describe the arrangement of the electrons 3. Name the element for which the atom is an isotope and 4. State its valency. SOLUTION 1. Nucleus = 13 protons + 14 Neutrons, Atomic mass = 27 2. Electronic configuration = 1s² 2s²...
by Sunday | Sep 25 | NABTEB QUESTIONS
USES OF ALUMINIUM – For making cooking utensil – For making overhead electric cables – Aluminum powder is used in paint/mirror, cars (coating of glass) – For making alloys (e.g. bronze is CU&Al) – In the thermit process (for welding...
by Sunday | Sep 25 | NABTEB QUESTIONS
PHYSICAL PROPERTIES OF ALUMINUIM – It is a silvery-white solid – It has a relatively low density(2.7) – It is very malleable and ductile – It has a moderate tensile strength – Its melting point is 6600c – It is a very good conductor...
by Sunday | Sep 25 | NABTEB QUESTIONS
1) How sodium reacts with water 2) What happens when water is added drop by drop to quick lime 3) The amphoteric property of aluminum. SOLUTION i. 2Na(s) + 2H2O(l) → 2NaOH(aq) +H2(g) ii. CaO(s) + H2O(l) → Ca(OH)2(s) iii. 2Al(s) + 6HCl(aq) → 2AlCl3(aq) +3H2(g) OR...
by Sunday | Sep 25 | NABTEB QUESTIONS
FACTORS THAT CAN AFFECT REACTION RATE. 1) Nature of the reactants 2) Concentration/pressure ( for gases) of the reactant 3) Surface area of reactants. 4) Temperature of reaction mixture 5) Presence of light 6) Presence of a...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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