Answer:
A smallest particle of an element that can take part in a chemical reaction is called an atom.
Explanation:
A vertical column is called a family, or a group. A horizontal column is called a period.
I’ve attached a little picture that shows this!
Answer:
I think the best answer is (5) because catalyst are known to speed up a reaction without being changed
Hydrogenated vegetable oil is a preservative, thus, the correct option is D. Hydrogenated vegetable oil are used by food industries to prevent fat rancidity in order to give their product a longer shelf life. Hydrogenated oils are very good preservatives because all the enzymatic activities in the oil has been neutralized during the hydrogenating process.
