Oxygen has an atomic number of 8. Which of the following could form the nucleus of an atom of oxygen? 6 protons and 8 neutrons.
4 protons and 4 neutrons. 6 protons and 2 neutrons. 8 protons and 10 neutrons.

Easy definition for atom and atomic mass

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.