Respuesta :
Answer:
Hydrogen is a colorless, tasteless, and odorless gas. Â
physical
Hydrogen is very combustible in the presence of oxygen. Â
chemical
Hydrogen is very reactive with most elements. Â
chemical
Hydrogen is the least dense of all elements. Â
physical
Explanation:
I put these in order
Hydrogen is a colorless, tasteless, and odorless gas.
⇒ physical
Hydrogen is very combustible in the presence of oxygen.
⇒ chemical
Hydrogen is very reactive with most elements.
⇒ chemical
Hydrogen is the least dense of all elements.
⇒ physical
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