Chemistry
Rewrite the incorrect statements only by rectifying the incorrect word/s in the statement.
(a) Periodic table is based on the fundamental property atomic weight.
(b) Elements in the periodic table are arranged in seven horizontal rows called 'groups', which ends with an element having one electron in outermost shell.
(c) Period numbers i.e., 1, 2, 3 signifies the no. of electron shells of an element e.g. period 3 element 'Mg' has 2 shells.
(d) Across a period from left to right the no. of electron shells increases by one & the valence electron remains same.
(e) Group numbers i.e., 1, 2, 3 signifies the number of electron shells of an element.
(f) Down a sub-group, the valence electrons & the number of electron shells remains same.
Periodic Table
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Answer
The corrected statements are given below:
(a) The periodic table is based on the fundamental property atomic number.
(b) Elements in the periodic table are arranged in Seven horizontal rows called periods, which ends with an element having a full outermost shell.
(c) Period numbers i.e., 1, 2, 3 signify the number of electron shells of an element e.g. period 3 element 'Mg' has 3 shells.
(d) Across a period from left to right, the no. of electron shells remains same and the number of valence electrons increases.
(e) Group numbers i.e., 1, 2, 3 signify the number of valence electrons of an element.
(f) Down a sub-group, the valence electrons remain the same & the number of electron shells increases.
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