1. According to Newland’s octave rule, chlorine shows similarity with fluorine. Because, chlorine is …………………
Ans: According to Newland’s octave rule, chlorine shows similarity with fluorine. Because, chlorine is the eighth element from fluorine.
2. According to Mendeleev’s periodic law properties of elements are ……………….
Ans: According to Mendeleev’s periodic law properties of elements are a periodic function of their atomic masses.
3. The number of electrons in the outermost shell of an atom determines the ……………
Ans: The number of electrons in the outermost shell of an atom determines the valency of an element.
4. Electropositivity means ………………
Ans: Electropositivity means the tendency of an atom of an element to form cation by losing its valence electrons.
5. According to Dobereiner’s triads rule, three elements in an increasing order of atomic mass shows …………
Ans: According to Dobereiner’s triads rule, three elements in an increasing order of atomic mass shows, the atomic mass of the middle element in each triad approximately equal to the mean of the atomic masses of the other two elements.