Protons-33
neutrons-42
electrons-33
Answer: Valence electrons are involved in a chemical reaction.
Explanation:
A chemical reaction takes place when there is an involvement of valence electrons. Bond formation involves either sharing of valence electrons or transfer of valence electrons. Bond breaking involves the separation of valence electrons.
When valence electrons are shared between the atoms, it leads to the formation of covalent bond.
When transfer of electrons takes place from one atom to another atom, it leads to the formation of ionic bond.
Hence, valence electrons are involved in a chemical reaction.
I think is A
Is it an atomic model? I'm not really sure
A catalyst is a substance that increases the rate of a chemical reaction without itself being consumed . (ans: second choice)
D, the more liquid there is, the less the temperature will be affected