考点一:核外电子排布原子的核外电子排布是指原子中的所有电子按一定的规则分布在各个原子轨道上。电子在核外的排布必须遵循以下原理:①能量最低原理;②泡利不相容原理;③洪特规则。例1 C、Si、Ge、Sn是同族元素,该族元素单质及其化合物在材料、医药等方面有重要应用。请回 Test site one: nuclear electronic arrangement Nuclear atomic arrangement of electrons refers to all the atoms in the atom according to certain rules distributed in each atomic orbit. The distribution of electrons outside the nuclear must follow the following principles: ① the principle of the lowest energy; ② Pauli incompatible principle; ③ Hunter rules. Example 1 C, Si, Ge, Sn are the same elements, the group of elements and their compounds in the material, medicine and other important applications. Please return