Periods - the horizontal rows in the periodic table, Number of Neutrons - it is calculated by subtracting the atomic number from the atomic mass., Element - these are pure substances that cannot be broken down anymore, Atomic Number - Found at the top left of the element to indicate the atomic number of that element , Groups - the vertical columns in the periodic table., Atomic Mass - Found at the bottom of the element symbol to indicate the mass of that element ,

Grade 7 Natural Sciences

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