1) An atom has the symbol above, how many protons are there in the nucleus of this atom? a) 6 b) 8 c) 14 d) 20 2) A Lithium nucleus contains 3 protons and 4 neutrons. What is its mass number? a) 3 b) 4 c) 7 d) 1 3) A particular atom of Chlorine can be represented by the symbol shown 37Cl17. How many electrons are there? a) 17 b) 20 c) 37 d) 34 4) Where in an atom are the protons and neutrons located? a) electron shell b) nucleus 5) Which particle has a positive charge? a) electron b) neutron c) proton d) atom 6) Where are the electron shells located in an atom? a) Nucleus b) In the centre c) Around the outside d)  Inside the electron 7) How many electrons does an atom of Oxygen have? a) 8 b) 6 c) 16 8) The number of protons in an atom is equal to the number of electrons.. a) true b) false 9) What is the atomic number? a) the number of protons b) the number of protons and neutrons c) the number of neutrons d) the number of protons and electrons 10) How many electrons are there in an atom with atomic number 50? a) 5 b) 50 c) 25 d) 80

Retrieval Quiz - Atomic number and Mass number

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