Is oxygen a metal ?, yes, no, what does the atomic mass represent?, no.of protons and electrons, no. of electrons and neutrons, no. of protons and neutrons, If the atomic number of sodium is 11,how many protons are there?, 11, 5, 6, what is the electron configuration of pottasium if the atomic number is 19, 2,8,8,1, 2,8, 8,8,2,1, how many electrons are ther in the outer shell of group 0, 8, 0, 7, who discovered that electrons orbit around a positively charged centre?, Neils bohr, Earnest Rutherford, JJ Thompson, who introduced the plum pudding model?, Earnest Rutherford, Neils bohr, JJ Thompson, if an atom is neutral what does it mean?, electrons equal to the no. of protons, there are only neutrons are present, there are no protons ,neutrons or electrons, what are isotopes?, different no. of electrons, different no. of protons, different no. of neutrons, mass of protons?, 1, 2, 0.

ATOMS

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