Tag Archives: hydrogen as an alkali metals

Explanation Hydrogen is the lightest element with 1 atomic mass unit , it is the first element in the first 20 elements in the periodic table, hydrogen exists in form of several isotopes . Hydrogen is found in combined form with other elements such as with oxygen to make up water and also in hydroxidesContinue reading “Explain why hydrogen can be regarded as either a group i element or a group vii elements in the periodic table of the first 20 element ?”