periodic-table-元素周期表GROUP 1 IA 1 1.00794 Periodic Table of the Elements Atomic Number Symbol 18 VIIIA 2 4.002602 H 1 2 1 0.0899 -259.14 37 Hydrogen S1/2 2.2 13.5984 -252.87 120 1 1s +1,-1 2 IIA 4 9.012182 3 Name Hydrogen *Density [Note] 0.0899 13.5984 ...
An atom has an equal number of electrons and protons. 原子有相等数量的电子和质子。 This number became known as an element’s atomic number. 后来,这个数字被称为元素的原子序数。 Today, elements on the periodic table are arranged by atomic number, which gives a more accurate understanding of el...
periodic table of elements(元素周期表),简称periodic table(周期表)。 整个周期表根据元素价电子层排布方式被分为了五个大块的block(区): s-block,f-block,d-block,ds-block,p-block 这些区外,元素周期表还被人们划分为了更基本的“周期”与“族”。 中文课本上介绍周期表分区的配图 [来自网络] 1.1原子与...
The Periodic Table of Elements 1 HYDROGEN H 1 7 6 4 BERYLLIUM 3 LITHIUM Li 23 Be 9 24 CARBON C 12 23 Atomic Number = Number of Protons = Number of Electrons Chemical Symbol Chemical Name Atomic Weight = Number of Protons + Number of Neutrons* 5 6 2 BORON B 11 27 CARBON C 12 28...
The elements in the periodic table are arranged in order of___. A. atomic number B. mass number C. atomic weight D. electron configuration 相关知识点: 试题来源: 解析 A。元素周期表中的元素是按照原子序数排列的。选项 B 质量数、选项 C 原子量和选项 D 电子构型都不是元素周期表排列的主要依据...
The periodic table of the elements was developed well over 100years ago. At that time it was an empirically derived arrangement based on the physical properties of the known elements. The modern periodic table is an arrangement of eleme...
PeriodicTableoftheElements Selectanelement (=Internetlink)Name:HydrogenSymbol:HAtomicNumber:1AtomicMass:1.00794amuMeltingPoint:-259.14°C(14.009985°K,-434.45203°F)BoilingPoint:-252.87°C(20.280005°K,-423.166°F)Name:HeliumSymbol:HeAtomicNumber:2AtomicMass:4.002602amuMeltingPoint:-272.0°C...
atomicmass electronconfiguration Periodictableofelements maingroupelements（主族元素）transitionelements（过渡元素）Noblegases/inertgas(稀有气体/惰性气体) s/p/d/fblock(s、p、d、f区)Periodictableofelements Non-metal:非金属Metalloid:准金属Metal:金属 alkalimetal（碱金属）['...
When Dmitri Mendeleev drew up the periodic table, he grouped elements of similar properties. Based on the number of electrons, a scientist can determine which group to place an element into.This pattern is called a period(or row) on the periodic table. ...
4 The Periodic Table consists of elements arranged in order of increasing atomic number.(a)(i) What is meant by the term atomic number?(1) A the number of neutrons in an atom B the number of protons in an atom C the number of protons plus the number of electrons in an atom D the...