What is the first element to have a different number of protons and neutrons in the nucleus?

What is an organic chemical

After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?

What is H2O? for chemistry

Which is a saturated solution?

A mixture of three noble gases has a total pressure of 1.25 atm. The individual pressures exerted by neon and argon are 0.68 atm and 0.35 atm, respectively. Wha t is the partial pressure of the third gas, helium?

Two chemical tests of water

A new medication dissolves blood clots. however, if too much is used excessive bleeding occurs. which methob should you use

Which element could likely substitute for Si in a solid solution

What is the potential of a cell made up of zn / zn2 + and cu / cu2 + half-cells at 25°c if [zn2+] = 0.31 m and [cu2+] = 0.81 m?

Which renewable energy source depends on changing water levels?