<span>The atomic number of a neutral atom is equal to the number of protons and the number of electrons of the atom. The atomic weight meanwhile is equal to the sum of the number of protons and number of neutrons.Hence we can say that the number of protons is 8 and the number of neutrons is 10. </span>
Sodium atom , potassium atom and cesium atom have the same group number which is group 1
C) why because it’s says 320 cL wich means that.....
