NATS 1870 Lecture Notes - Lecture 21: Ionic Bonding, Chemical Bond, Fluorine
26 Mar 2017
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Question 1: which statement is not correct about the periodic table of elements: A: elements on each row share the same chemical properties, elements on each column share the same chemical properties, elements on each column has the same number of valence electrons. B is the incorrect statement about periodic table, so therefore, c and d are correct. D (elements on each column has the same number of valence electrons) Between a and b, a is obvious because it"s a classification of the elements. They organize the elements of the universe based on the outer shell of the atoms/elements. They classify the elements based on that: valence electrons. Therefore, when they classified it like this, it comes that all the elements on the same column has the same number of valence electron on the last shell, therefore, they share the same chemical properties. In the row, the number of electron just increase one by one, in each atom.
