Answer:
i rlly dont know i just want pionts pls follow me btw
Wireless devices, wi-fi routers, granite countertops, microwaves, cigarettes (if you smoke in your house), older box-shaped tv’s, antiques (furniture, jewelry, silverware), smoke detectors ( some use small amounts of radioactive isotope, americium-241 to alert you when there’s smoke in the air, light bulbs, computer screens, electric blankets, garage door openers. Hope it helps.
Vanadium (V)
Vanadium is the only one in the 4th period here so
Answer:
H2O is a compound because its a main constitute of earths hydrosphere
