Are there good chemicals and bad chemicals in chemistry?

Huh???? All chemicals can be used for something, therefore they are good. All chemicals can be harmful in some way so therefore they are bad.

No such thing,,,,, good and bad are matter of perspective

Absolutely! It depends on your needs, a good chemical that can be used to bring the pH of a solution down is sulfuric acid. A bad chemical for such a a task would be something like nickel, its isnt going to help. A good chemical for tossing on steak to make it taste better is NaCl. A bad chemical for that same task would be NaCN. Some people might say that the bad chemicals are the ones with the skull and crossbones on them, but they can often be more useful than the ones without them.

No there aren´t!! It depends on a point of view!! For some Cesium is a good chemical element!!

It is necessary to understand, that the sciences, including chemistry, and therefore the substances which are used, whether solidos, liquids, gasesos, plasma, etc., are tools for the inventiveness of man is man, who decides to use, he resumption, and that use, being good for the, and yours, you may be seen by others, is bad for all, a classic example gas ziklon B, used by the Nazis in the cameras of gas for the Jewish, from a point of view strictly pragmatic, the "productivity" was excellent, was tapeworm a pace of production "efficient", but we have already read and seen, criticism that he makes such gas and to its inventors and users in our society today. In addition, it is necessary, remember that the excess is the bad, not the product in whether. Example, water, vital for the life on earth, mortal, if one does not know swim and is sinking into it. The oxygen, a man with a disease that is subjected to oxygen therapy in a hospital, it is good, but if used pure oxygen, it's lethal in 8 hours in the lungs of this person.

There are no " good " and " Bad " chemicals. It depends how you use it. Small dose of snake poison is medicine. The first and perhaps the most obvious use of snake venom is the production of anti-venom, the main technique used to produce anti-venom is known as the 'horse serum' method. Here the snake is milked of its venom as illustrated by the image, then a small non-lethal dose of the venom is injected into a horse. The horse is then given time to produce antibodies to the venom, a sample of blood is removed from the horse and the antibodies are extracted. This anti-venom can now be used to treat patients, although unfortunately a third of patients are allergic to this serum. he protein contortrostatin which was extracted from the venom of the Southern Copperhead Viper Agkistrodon contortrix , has been shown to slow the growth of breast cancer cells (implanted into mice) by up to 70%2. The protein is cytostatic (it prevents/slow tumour growth) rather than cytotoxic (kills tumour cells). The protein inhibits blood vessel development, the quick formation of which is essential to the rapid growth of tumour cells, this in turn prevents the growth of the tumour. Apitherapist uses bee venom to treat arthritis

bad chemicals are poisonous chemicals

All chemicals have a distinct purpose in the long run, whether they are "bad" in excess. For example, nitrous oxide isn't a 'good' chemical to play with, but it is important in medical industry as well as a stable atmosphere. Having dealt with chemicals in a lab, I find that Cobalt compounds are the most difficult chemicals ever. They have definite properties that make identification easy, but because of their bonding capabilities as metal complexes, it makes for a very long and arduous procedure. Ask anyone who takes Chem 205 at UIUC. Not fun!

eeerrr... by bad if u mean poisons... then yeah... actually i wont term them as bad... but dangerous...