The table given below represents the first three periods of the modern periodic table. Study the table and answer the questions that follow:
(a) Which of the lettered elements is an inert gas.
(b) State two of the lettered elements which are in the same group.
(c) Give the name and position of the lettered halogen element in the table.
(d) Which one of the lettered elements would you expect to react violently with chlorine.
(e) How many electrons are present in valence shell of an element E with atomic number 18.
(f) What is the name given to the energy released when an atom in its isolated state accepts an electron to form an anion.
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