Why are some isotopes radioactive?

Among pattasium and calcium which is more reactive, why

Solid ZnCl2 and liquid ZnCl2 have different (1) empirical formulas (3) ion ratios (2) formula masses (4) physical properties

How many cells are needed to create a living organism?

In the drawing above, the hammer is acting as what type of simple machine? A. pulley B. screw C. wheel and axle D. lever

What experiment did J. J Thomson do? A. He suspended charged oil drops in chamber B. He sent a cathode day between electrically charged metal plates. C. He shot alpha particles through gold foil D. He hit metal plates with light

If 100 mL of a gas were enclosed in a buret at 500 mm Hg, what volume would the gas occupy at 1000 mm Hg at the same temperature? P1V1=P2V2

Would Mn (HPO4) 2 be manganese (II) monohydrogen phosphate?

The fundamental frequency of a violin string is 440 hz. the frequency of its second harmonic is

How much of a 15.0M stock solution do you need to prepare 250ml of a 2.35ml hf solution?

A synonym for dwindled