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20 ICSE Chemistry – 10
5. To which electronic shell would an incoming electron go in the case of elements belonging to
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(b) the last element of a period
(c) an element of the oxygen group and
(d) a noble gas element?
7. Name the properties of the elements which
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8. By giving suitable examples show that all the elements of a group show similar properties, while the properties
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(a) 2, 8, 3 (b) 2, 8, 18, 5 (c) 2, 8, 7
(d) 2, 8, 18, 8, 1 (e) 2, 8, 2 (f) 2, 5
(g) 2, 8, 18, 8
Answer the following:
(i) To which group does each belong?
(ii) To which period does each belong?
(iii) Which is an inert gas?
(iv) Which is an alkali metal?
(v) Which is a halogen?
(vi) Which elements belong to the same group?
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(viii) Which elements belong to the same period?
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(i) All the elements in a group of the periodic table have the same
(a) atomic number (b) mass number
(c) atomic mass (d) number of valence electrons
(ii) The long form of the periodic table is based on
(a) molecular masses (b) atomic masses
(c) atomic numbers (d) mass numbers
(iii) According to the modern periodic law, the properties of elements are a periodic function of their
(a) atomic number (b) atomic mass
(c) atomic volume (d) mass number
(iv) Which of the following elements has the highest electronegativity?
(a) I (b) Br
(c) Cl (d) F
(v) The number of elements in each of the long periods is
(a) 2 (b) 8
(c) 18 (d) 32
(vi) An element with atomic number 19 will most likely combine with the element whose atomic number is
(a) 17 (b) 11
(c) 18 (d) 20
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(i) (d) (ii) (c) (iii) (a) (iv) (d) (v) (c) (vi) (a)
