Henri Becquerel is the first scientist who discover evidence of radioactivity.
Maria Curie is one of the most famous scientists in the world who invented the word "radioactivity". She discovered that radioactive materials gave out rays and discovered two elements: polonium and radium, which are extraordinary active.
Answer:
CaO + H₂O ⟶ Ca²⁺ + 2OH⁻
Explanation:
CaO + H₂O ⟶ Ca²⁺ + 2OH⁻
base acid conj. acid conj. base
Answer:
→A space heater warms a room⇒By converting electrical energy into heat energy.
→You eat dinner⇒Our body uses chemical energy to break down the food
→A radio plays⇒By converting electrical energy into sound energy in an electric radio. And by converting chemical energy into sound energy in a radio which runs with a cell.
Explanation:
I think it's called "<span>combustion." are there any answer choices though?
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