Exam (elaborations)
A Level Chemistry A H432/01 Periodic table, elements and physical chemistry Sample Question Paper
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1 Which row shows the atomic structure of 55Mn2+? Protons Neutrons Electrons A 25 30 23 B 25 55 23 C 27 30 25 D 30 25 28 Your answer [1] 2 The Group 2 elements react with water, forming a solution and a gas. Which statement is correct? A The reactivity of the elements decreases down Group...
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