Answer:
Catalyst speeds up the chemical reactions. Catalyst is the compound that adds to the chemical reaction so that it happen more quickly. Catalyst without being consumed in the reaction accelerates the reaction. It lowers down the activation energy of the transition state and thus accelerates the reaction.
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Covalent example ch4 where carbon is covalently bonded with all 4 hydrogens
They have same chemical properties
for example the elements of group VIII are called noble gases .They are unreactive, odorless and colorless.
Answer:
i think d is the answer for this
B as the glass just changes form as it shattered but the chemical composition is same as it was before
