Abuja — The West African Examinations Council (WAEC) has postponed the full implementation of the computer-based test (CBT) format for the 2026 Senior School Certificate Examination (SSCE) until 2027, according to a statement released at the council’s 63rd annual meeting in Umuahia, Abia State. Hajia Binta Abdulkadir, Chairman of WAEC’s Nigeria National Committee, explained that the 2026 May/June edition will now serve as a pilot phase — allowing candidates to sit for either the traditional paper-and-pen test or the digital format. She emphasized that no student will be disadvantaged by the transition. The delay follows widespread concern over the readiness of many schools, particularly in rural areas, for full digital exams. Many institutions lack adequate computers, reliable electricity, internet connectivity, and trained personnel—factors WAEC and the Federal Ministry of Education say are essential for a successful rollout. To facilitate the switch, WAEC co...
Matter has different types of particles, such as atoms, ions, molecules, etc. An element is made up of atoms. A mole is used to represent the number of atoms in an element just as a crate is used to represent 30 eggs. Avogadro’s number is the number of units in a mole of any substance and it is equal to 6.02 x 10 23 . Therefore, one mole of any substance is represented by 6.02x10 23 . A diatomic element like chlorine is 6.02x10 23 molecules of chlorine. One mole of tetraoxosulphate (VI) oxide and one mole of methane each represents 6.02x10 23 molecules of these compounds. Similarly, sodium and calcium elements each also contain 6.02x10 23 atoms. Example Question 1 How many atoms are there in 10g of sodium? (Na = 23, Avogadro’s number = 6.02x10 23 ) Since one mole is equal to 6.02x10 23 and one mole is equal to relative atomic mass expressed in grams. 1mole = 6.02x10 23 1mole = 23g 23g = 6.0...