How does chemistry affect our world? a. chemicals makes our world more polluted. b. chemicals keeps us healthy. c. chemicals can or hurt our world. d. chemicals make our world safe to live in.

C.Chemicals can help or hurt our world.

Explanation:

Chemistry: it is a branch of science which study  the composition, properties and activity of organic substances and inorganic substances and various elementary forms of matter.

It study chemical reactions,properties and phenomenon etc.

In chemistry, we use chemicals for chemical reactions.

Drugs are made with salt like aspirin .Salt are chemicals.

Chemical use in drugs and drugs are used for treatment of diseases.

Then, chemicals are useful in these case.

But, the chemicals used in fertilizers, use for  production increase of fruits and vegetables.Then it is harmful for humans and soils.

In this way it harmful  for our world.

Hence, chemicals can help or hurt our world is correct answer.

C.Chemicals can help or hurt our world.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."