Respuesta :
Answer:
Hydrogen is placed in group one (non-metals) because hydrogen is not a metal. It is a highly reactive gas. It has the lowest atomic mass, and belongs with the gases in group one.
Explanation:
Answer:
Hydrogen is placed in group one (non-metals) because hydrogen is not a metal. It is a highly reactive gas. It has the lowest atomic mass, and belongs with the gases in group one.
Explanation: