1) On the periodic table, what do we look at to find the number of protons in an element? a) atomic number b) atomic mass c) subtract atomic number and atomic weight d) add atomic number and atomic weight 2) The periodic table of elements is organized by what? a) atomic mass b) groups c) atomic number d) periods 3) To find the number of neutrons in an element, you should first __________ the atomic mass. a) add all the numbers b) subtract all the number c) round to the nearest whole number d) just forget about the decimals 4) What is the atomic number for neon? a) 20 b) 21 c) 11 d) 10 5) To find the number of electrons in an element, look to the _________. a) atomic mass b) add the atomic number and atomic weight c) atomic number d) subtract the atomic number and atomic weight 6) What is the atomic mass for chlorine? a) 17 b) 52 c) 35 d) 18 7) When you subtract the atomic number from the atomic mass, you will get the number of _______. a) protons b) neutrons c) electrons d) protons and neutrins 8) Which two subatomic particles make up the majority of weight in an element? a) protons and electrons b) electrons and neutrons c) protons and neutrons 9) Which subatomic particle is found in the electron cloud? a) protons b) electrons c) neutrons 10) How many electrons does cobalt have? a) 59 b) 89 c) 27 d) 58

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