subatomic particles
what are the subatomic particles and what are their charges?
protons (positive), neutrons (neutral), electrons (negative)
nitrogen has 7 protons, 7 neutrons, and 7 electrons -- what is the atomic mass?
12 amu
draw the solid sphere model. who discovered it?
(circle) John Dalton
how many protons does tin have?
50 protons
where are each of the subatomic particles found?
protons (in the nucleus), neutrons (in the nucleus), electrons (in the electron orbit)
phosphorus has 15 protons and the atomic mass is 31 -- how many neutrons does it have?
16 neutrons
draw the nuclear model. who discovered it?
(nucleus with protons/neutrons, electron orbit(s) with electrons) Ernest Rutherford
lead has an atomic weight of 207 and an atomic number of 82 -- how many protons does lead have?
82
what do each of the subatomic particles do for an atom?
protons = atomic number & atomic mass/weight
neutrons = atomic mass/weight
electrons = atomic properties & reactivity
the atomic mass of calcium is 40 -- how many neutrons does it have?
20 neutrons
draw the plum-pudding model. who discovered it?
(circle with charges) J.J.Thomson
calcium has 20 neutrons, 20 electrons, an atomic number of 20, and an atomic weight of 40. how many protons does calcium have?
20 protons
about how many grams is 1 amu and which of the subatomic particles weigh this much?
protons and neutrons both weigh about 1.67 x 10-24 grams
the atomic mass of zinc is 65 -- how many neutrons does it have?
35 neutrons
draw the quantum model. who discovered it?
(3-D elongated spheres joined at a point) Louis de Broglie & Erwin Shrödinger
titanium has 22 neutrons, 22 electrons, and an atomic weight of 44. how many protons does titanium have?
22 protons