State whether the following statement are true or false: (a) Newlands divided the elements into horizontal rows of eight element each. (b) According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers.
State whether the following statement are true or false: (a) Newlands divided the elements into horizontal rows of eight element each. (b) According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers.

(a) False. Newlands divided the elements into horizontal rows of seven element each and the first and last elements ended up on the same note.

(b) False. According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic masses and not of their atomic numbers.