Which statement best explains why the overall charge on an atom is zero? The positive charge of the neutrons in the nucleus equals the negative charge in the electro
O The positive charge of the protons in the nucleus equals the negative charge in the electron
O The negative charge of the neutrons in the nucleus equals the positive charge in the electro
The negative charge of the protons in the nucleus equals the positive charge in the electron

Please really need help

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry

Achemist is studying the following equilibirum, which has the given equilibrium constant at a certain temperature: 2 no(g) + cl2(g) < => 2 nocl(g) kp = 2 x 10^(-6)he fills a reaction vessel at this temperature with 13. atm of nitrogen monoxide gas and 12. atm of chlorine gas. use this data to answer the questions: a. can you predict the equilibrium pressure of noci, using only the tools available to you within aleks? y/nb. if you said yes, then enter the equilibrium pressure of nocl at right. round your answer to 1 significant digit.