2. an atom has 2 protons in its nucleus. which of the following must be true for this atom to have no net electrical charge?

the atom has 2 negatively charged electrons in the nucleus.

the atom also has 2 positively charged neutrons in the nucleus.

the atom has 2 negatively charged electrons outside the nucleus.

the 2 positive protons have no influence on the overall charge of the atom.

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt