Why does a nucleus always have a positive charge?

pls answer or else I will give you up.

Which of the following pressures is equal to 760 mm hg? 2.0 atm 101.3 pa 101,300 kpa 101,300 pa

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers