Sir plz solve the following quickly:

Sir plz solve the following quickly: Ill. Multiple choice questions: 1. Mendeléev's Periodic Law states that the physical and chemical properties of elements are a periodic function of: (a) their atomic numbers. (b) their atomic weights. (c) neither atomic numbers nor atomic weights. (d) both their atomic numbers and atomic weights. 2. In the Modern Periodic Table, there are: (a) 7 Periods and 18 Groups. (b) 18 Periods and 7 Groups. (c) 7 Periods and 7 Groups. (d) 7 Periods and 17 Groups. 3. In the periodic table, on moving from left to right in a given period the: (a) size of atoms increases. (b) valency of the elements with respect to hydrogen increases from 1 to 7. (c) number of shells remains the same. (d) valence shell decreases at each step by 1.