Question

Elements with symbols,valency,atomic no.,atomic masses

Answer 1

Theperiodic tableis said to be the most important part of chemistry as it makes it. All the elements are arranged in an informative order. They are positioned in the order from left to right and also top to bottom in an increasing order of their atomic numbers. This order coincides with the increase in their atomic mass.Every chemical element consists of a particular atomic number illustrating number of protons present within the nucleus. Most ofthe elements are isotopes. They are grouped under a single element, and they are never separated in the table.The table below consists of 118 elements of periodic table, sorted by atomic number, atomic weight, symbols, density, discovered year and the group.Atomic NoAtomic MassChemical Element NameSymbolDiscovery (Year)Group11.0079HydrogenH1776124.0026HeliumHe18951836.941LithiumLi1817149.0122BerylliumBe17972510.811BoronB180813612.0107CarbonCAncient14714.0067NitrogenN177215815.9994OxygenO177416918.9984FluorineF1886171020.1797NeonNe1898181122.9897SodiumNa180711224.305MagnesiumMg175521326.9815Alumin

Answer 2

aluminium is the answer for this from my side
pls marke as brain list