What is the importance of metals in medicine?

Platinum: Platinum based compounds have been shown to specifically effect head and neck tumors.

Gold: Gold salt complexes have been used to treat rheumatoid arthritis. The gold salts are believed to interact with albumin and eventually be taken up by immune cells, triggering anti-mitochondrial effects and eventually cell apoptosis.

Lithium: Li2CO3 can be used to treat prophylaxis of manic-depression.

Zinc: Zinc can be used topically to heal wounds. Zn2+ can be used to treat the herpes virus.

Silver: Silver has been used to prevent infection at the burn site for burn wound patients.

Platinum, Titanium, Vanadium, Iron: cis DDP (cis-diaminedichoroplatinum), titanium, vanadium, and iron have been shown to react with DNA specifically in tumor cells to treat patients with cancer.

Gold, Silver, Copper: Phosphine ligand compounds containing gold, silver, and copper have anti-cancer properties.

Lanthanum: Lanthanum Carbonate often used under the trade-name Fosrenol is used as a phosphate binder in patients suffering from Chronic Kidney disease.

Bismuth: Bismuth is used as an antacid.

for points guys

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !