If element X has 67 protons, how many electrons does it have?

A 78 gram sample of uranium loses half of its mass each year. how much is left after 6 years?

All of the following elements will form ions by gaining electrons, except iodine magnesium sulfur phosphorus

What does it mean for a scientist to be accurate?

During an earthquake with intense seismic activity, loose wet soil is turned into a fluid slurry that is capable of swallowing entire buildings. What is the event called that causes this type of physical damage?

Consider the reaction 2H2S (g) ⇌2H2 (g) + S2 (g), Kp=2.4*10-4 (at 1073 K) A reaction mixture contains 0.111 atm of H2, 0.051 atm of S2, and 0.566 atm of H2S. Determine how these conditions compare to equilibrium conditions.

The [H3O+] in a solution is increased to twice the original concentration. Which change could occur in the pH? 2.0 to 4.0 1.7 to 1.4 5.0 to 2.5 8.5 to 6.5 6.8 to 9.8

How can I differentiate between Ionic compounds, molecular compounds, and acids given only the formula?

Features of carbon that makes it unique in organic chemistry

What is the difference between hydrostatic pressure and atmospheric pressure?

What is the change in energy? e of the hydrogen atom as the electron makes the transition from the n=3 energy level to the n=1 energy level?