Why are the elements fluorine (f), chlorine (cl), and bromine (br) all found in the same group within the periodic table? they all exist as gases at room temperature. they all react with the noble gases. they have similar chemical properties. they are all non-metals that form 1+ ions.

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl