8. Write the notation of an atom 'X', if the mass number is A and the atomic number is Z.
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As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml