The chlorine atom has a higher electronegativity than the ... Electronegativity and ionization energy follow the same periodic table trend. Elements that have low ionization energies tend to have low ...

There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...

The periodic table The periodic table is a chart of ... The three common Group 7 elements are chlorine, bromine and iodine. The word ‘halogen’ means 'salt former'. Group 0 and testing ions ...

These are almost one-quarter of the periodic table ... are essential elements that our bodies need in larger amounts: oxygen, carbon, hydrogen, nitrogen, phosphorus, sulphur, chlorine, potassium ...