Answer:
D. They react readily with oxygen in the air
Answer:
B. Are fixed within electron orbitals
Explanation:
Electrons are found in the energy levels
Arrhenius definition of a base
An Arrhenius base is a substance that increases the concentration of OH- ions when dissolved in water.
Answer:
Explanation:
First Question. Answer is: B. They are different.
For examle, balanced chemical reaction of forming water from hydrogen and oxygen:
2H₂ + O₂ → 2H₂O.
During chemical reaction no particles are created or destroyed, the atoms are simply rearranged from the reactants to the products.
Oxygen (element) has boiling point of -183°C and hydrogen has boiling point of -253°C. In this chemical change water (compound) is produced and it has new boiling point, boiling point of water is 100°C.