how do you find atoms nucleus electrons atomic mass in beryllium from the periodic table elements?

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how do you find atoms nucleus electrons atomic mass in beryllium from the periodic table elements?

2007-02-05 10:24:00 · 2 answers · asked by yaya y 1 in Science & Mathematics ➔ Chemistry

2 answers

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2007-02-05 10:32:41 · answer #1 · answered by Anonymous · 0⤊ 0⤋

You look up on the Periodic Table to Group IIA to beryllium. You see that it is atomic number 4. That means that it has four electrons, 1s2 2s2. You see that the atomic mass is 8.

2007-02-05 18:35:44 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋