Which of the following statements about the resting membrane potential is true? group of answer choices
a) the inside of the membrane is positively charged compared to the outside.
b) it is due in part to the presence of extracellular proteins.
c) it is normally equal to 0 mv.
d) it results, in part, from the concentration gradients for na+ and k+.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the answer is c. nacl

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.