the atoms tend to share valence electron in their respective outer energy level
黃色的LEBAL是指甚麼 (在他們各自能量LEVEL的最外層)
形成covalent bond它是怎麼share???請詳述
點點在element的周圍怎麼看
f的outer shell has seven electrons 在加另一個f的outer shell has seven electrons
要怎麼變成 FLUORINE MOELCULE 上圖的點點是怎麼排列的