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Waec 2011 Chemistry Past QuestionsQuestion 6:An element with the electron configuration of 1s 22s 22p 6 would have a combining power of A. O B. 2 C. 6 D. 8 Question 7:Rare gases are stable because they A. Contain equal number of protons and neutrons B. Contain more electrons than protons C. Are chemically active D. Have octet structure Question 8:Which of the following elements would produce coloured ions in aqueous solution? A. Calcium B. Lron C. Magnesium D. Sodium Question 9:The energy change that accompanies the addition of an electron to an isolated gaseous atom is A. Bond energy B. Electronegativity C. Electron affinity D. Ionization energy Question 10:Which of the following hydrohalic acids is the weakest? A. HBr B. HCI C. HF D. HI |
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