The Periodic Table
完成条件
按索引浏览词汇表
特殊 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 全部
E
Eka-a prefix used by Mendeleev meaning "one," indicating an undiscovered element one place below a known element. | |
ElectronA negatively charged particle found outside the nucleus. | |
Electron arrangementthe distribution of electrons around the nucleus of an atom. | |
Electron shellA region around the nucleus occupied by electrons. | |
ElementA substance made of atoms that all contain the same number of protons. | |