Why is the atomic mass (listed on the periodic table) a decimal number? e. It shows how small the nuceus is f. It represents a portion of the atom g. It represents the average of all of the isotopes of a given element h. It shows that the nucleus of an atom can have a portion of a proton
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Ответ:
i proposed that, since nitrogen makes up 78% of air, you could leave a crucible over an open flame for a long time to get it hot with an open lid to allow air in. thats because it is expected that you know magnesium reacts with the oxygen (burns) in the air to produce a whilte solid.
your new experiment isn't doing anything different than attempting to delay the time before magnesium is allowed to react with the elements in the air (both oxygen and nitrogen)