Periodic Table
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Question 1
i. According to ‘Newland’s Law of Octaves’ the properties of every eighth element were comparable to those of the first when the lighter elements were arranged in sequence of increasing atomic weights.
ii. Newland’s comparison was based on the eight notes of the musical scale.
iii. According to ‘Newland’s Law of Octaves’, Pottassium (K) is the next element with similar characteristics to that of Lithium (Li).
iv. Newland divided the elements into horizontal rows where each horizontal row had 7 elements .
Question 2
Question 3
i. Modern periodic table is put forward by Dmitri Mendeleev.
ii. The periodic functions of an element's atomic number determine its physical and chemical characteristics.
iii. The modern periodic table has 17 vertical columns called groups and 7 horizontal parallels called periods.
iv. The number of valence electrons in the current element decreases from 8 to 1 as it moves from left to right in one period.
Question 4
Question 5
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