Question

Date:-4 September
Day:-Saturday
science questions
#Write short notes
1.dobereiners triads
2.newlands law of octaves
3.Mendeleev periodic table​

Answer 1

Answer:

1.)According to Dobereiner's law of triads, when elements are arranged in increasing order of their atomic masses, a group of three elements with similar chemical properties is obtained. ... The atomic mass of the middle element is equal to the arithmetic mean of the atomic masses of the other two elements.

2.)Newland's Law of Octaves states that when Elements are arranged in increasing order of Atomic Mass, the properties of every eighth Element starting from any Element are a repetition of the properties of the starting Element. Law of Octaves was true only for Elements up to Calcium

According3.) to Mendeleev's Periodic Law, “Physical and chemical properties of elements are a periodic function of their atomic masses”. Mendeleev classified elements according to their atomic masses and arranged these elements in increasing order of their atomic masses