(i) The metallic property of elements decreases as we move horizontally from left to right.
(ii) The atomic size of elements decreases as we move horizontally from left to right.
Given alongside is a part of the periodic table :
LiBe BCNOFNaMgAlSiPSCl
As we move horizontally from left to right :
(i) What happens to the metallic character of the elements ?
(ii) What happens to the atomic size ?
Given below are a few elements arranged in the order of increasing atomic masses. Identify the pair of elements with similar properties according to Newlands’ Law of Octaves.
Complete the following table relating to the atomic structure of some elements.
ElementAtomicMassNumber ofNumber ofNumber ofSymbolNumberNumberNeutronsElectronsProtonsLi36Cl1720Na1211Al2713S3216