Two elements with the same number of protons but a different number of neutrons are called

Electrolysis uses electrical current to break water molecules in to oxygen gas and hydrogen gas. how do you know that this is a chemical change? A. their is a phase change from liquid to gas B. it is a single replacement action C.

Why is the atmospheric pressure lower on a high mountain peak than at sea level

Which electron configuration represents the electrons of an atom in a excited state? 1) 2-8-1 2) 2-8-6 3) 2-8-17-6 4) 2-8-18-5

Sort the statements based on whether the described outcomes result from thermal energy being added or being removed. Particles move faster. Particles move slower. Temperature increases. Temperature decreases. Kinetic energy increases.

What usually happens to the rate of reaction when the concentration of one of the reactants is increased

Does a gas discharge tube filled with boron emit the same wavelength

a certain solution has a molarity of m = 6.39 mol/l and has a volume of v = 0.550 l what is the value of n

Alcohols are polar molecules. true false

If a normal force of 500 N is acting on two surfaces in contact with a coefficient of friction equal to 0.50, what would be the maximum force of static friction?

Elements with the same number of shells are called? All the element that have the same number of valence electrons and have similar physical and che. ical properties are called?