Boron has two naturally occurring isotopes. Boron 10 abundance is 19.8%. Mass is 10.013 amu. Boron 11 Abundance is 80.2%. Mass is 11.009 amu. Calculate the average atomic mass of Boron.

b. examine and describe cells

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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