Question

Elements have been arranged in the following sequence on the basis of their increasing atomic masses.

F,

Na,

Mg,

Al,

Si,

P,

S,

Cl,

Ar,

K

1.  Pick two sets of elements which have similar properties.
2. The given sequence represents which law of classification of elements?

Answer 1

1. Sodium, magnesium aluminium and potassium are all metals while fluorine, phosphorus, sulphur, chlorine and argon are all non-metals.
2. The given sequence represents Mendeleev's law of periodicity.