Yusra1901 Yusra1901

20-10-2016
Chemistry

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HELP!
An atom of beryllium has an atomic number and a mass number of 9.

Describe the numbers and arrangements of the protons, neutrons and electrons in this atom.

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20-10-2016

I did a project on berylium and I am happy to help! Beryllium has 4 protons and 5 neutrons. It also has 2 electrons

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