Answer:
Cl is not a compound because compounds are made up of atoms from MORE than one element. Since Cl is a singular element is cannot be a compound
Explanation:
Just think of it as Compounds are always more than one elements are always Single
Sr is the most reactive. Correct me if I'm wrong :/
Answer: Number 3
Explanation: Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.
I think, I could be wrong though.
Substance - Elements and Compounds
Example of element is oxygen and that of compound is water.
Matter can be classified into mixture.
It can be heterogeneous and homogenous.
Example of heterogeneous mixture is milk.
Example of homogeneous mixture is air.
Please mark me Brainliest
Oh oh oh alrighty auto parts AOU