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1-the red circles because they are protons in the nucleus 1.2-protons nucleus 2- has 1 valence electron is in group 2a has 10 protons 2.1- valence 3- the elements in yellow are in the same column group row period 3.1- the element is in group 1a and has 1
3.1- the element is in group 1a and has 1 valence electron 3.2 - 1physical 2chemical 4 - compund has 7 total atoms 2 this formula contains 3 3 this compund is made of sodium 1 4.1- coefficiant front 5- 433.2 5.1- chemical element 6- reactant product

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