百度试题 结果1 题目What is the chemical symbol for nitrogen? A. N B. Ni C. Na D. Ne 相关知识点: 试题来源: 解析 a) Sun
Add one proton, one neutron, and one electron and you get an atom of beryllium (symbol Be).See how it works? In all atoms, the number of protons and the number of electrons is always the same. So nitrogen has 7 protons and 7 electrons, calcium has 20 protons and 20 electrons, and...
Symbol P. Atomic weight 31.0. Phosphorus Hence, any substance which shines in the dark like phosphorus, as certain phosphorescent bodies. Phosphorus A multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells;...