4. If the two atoms shown above are the same element, which statement is true? SC.8.P.8.7
A They have a different number of
electron clouds.
B They have a different number of
electrons.
C They have a different number of
neutrons.
D They have a different number of
protons.

Julius went on a volunteer trip to centralamerica and took medical supplies with him.he packed a bag with 50 pounds of supplies.he brought pieces of equipment that weighed10 pounds each and bottles of medicine thatweighed pound each prepresents thenumber of pieces of equipment he broughtand b represents the number of bottles ofmedicine he brought then the total weight canbe represented by the equation 10p+b 50.the brought 3 pieces of equipment, how manybottles of medicine did he bring?