Newlands Law of Octaves

Q. Newland's law of octaves can be applied to the set of elements consisting of:

1. Beryllium, magnesium, calcium
2. Sodium, potassium, calcium
3. Boron, nitrogen, carbon
4. Hydrogen, silicon, aluminium

Q.

Name all the synthetic elements in the modern periodic table.

Q. In 1865, an English chemist John Newlands arranged the elements in the increasing order of their ________ to explain their chemical properties.

1. Atomic number
2. Atomic volume
3. Valence electron
4. Atomic weight