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The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.
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Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line
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What is the source of continuous heat and energy that we receive from the sun
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