1) The correct way of showing the isotope of nitrogen with 7 protons and 8 neutrons is: a) ⁸₇N b) 157N c) ⁷₈N d) ⁸₁₅N 2) How many neutrons does the isotope of lithium have? a) 8 b) 4 c) 3 d) 5 3) How many protons does this isotope of titanium have? a) 22 b) 48 c) 26 d) 44 4) In a correctly written symbol what would be located in the "A" position? a) number of neutrons b) number of electrons c) atomic number d) mass number 5) What is the atomic number for an element with three protons? a) 6 b) 3 c) 9 d) 1

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