Зазначте символи елементів, яким характерні однозарядні йони (+1 чи -1). Cl
S
Na
Ca
Al

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

What happens to isotopes that are unstable?

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).