Fill in the blanks in the following statements: (a) The number of protons in the nucleus of an atom is called its ______. (b) The total number of protons and neutrons in the nucleus of an atom is called ______.(c) An atom has atomic mass number 23 and atomic number 11. The atom has ______ electrons. (d) An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ______. (e) If the nucleus of an atom has atomic number 17 , mass number 37 and there are 17 electrons outside the nucleus, the number of neutrons in it is ______. (f) Almost all the mass of an atom is concentrated in a small region of space called the ______. (g) Cathode rays are a beam of fast moving ______. (h) The anode rays obtained from hydrogen gas consist of particles called ______. (i) The maximum number of electrons that can be accommodated in L shell are ______. (j) The maximum number of electrons that can go into the M shell is ______. (k) The subatomic particle not present in a hydrogen atom is ______. (l) The electron has ______ charge, the proton has ______ charge, and the neutron has______ charge.