1) Any thing that has mass and volume is called ............... a) electron b) proton c) matter 2) 2- A subatomic particles whose mass equals 1 /1836 is calles a ................ a) protons b) electron c) proton 3) 3-The sum of the number of proton and neutron that compose the nucleus atom is a ........... a) mass number b) atom number c) energy levels  4) The electronic configuration of 7N is .......................... a) 2 , 4 b) 3 , 4 c) 2, 5 5) The atomic number of H gas which contains 1 proton is ................... a) 1 b) 0 c) 2 6) which of the following subatomic components has a mass of 1 u ?? a) protons only b) electrons only c) proton and neutron 7) The positive charged particles found inside the nucleus is ........................ a) electron b) proton c) neutron

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