# តារាងខួបនៃធាតុគីមី

តារាងខួបធាតុគីមី ( អង់គ្លេសPeriodic Table ឬ Table of Elements) គីជាតារាងមួយដែលបង្ហាញអំពី អាតូមនានា ដែលត្រូវគេរកឃើញនិងស្គាល់នៅក្នុង គីមីវិទ្យា ។ នៅក្នុងតារាងនេះ ធាតុគិមីត្រូវបានតម្រៀបតាមលំដាប់លំដោយ តាម លេខអាតូមរបស់ខ្លួនពីតូចទៅធំ។ លេខអាតូមរបស់ធាតុគីមីគឺមានចំនួនដូចគ្នានឹងចំនួននៃ អេឡិចត្រុង ឬ ប្រូតុងនៅក្នង អាតូម

តារាងខួបធាតុគីមី ត្រូវបានតម្រៀបឡើងជា២ផ្នែក៖ ខួប (periods) និងក្រុម (groups)

A row of elements across the table is called a period. Each period has a number: from 1 to 7. Period 1 has only 2 elements in it: hydrogen and helium. Period 2 and Period 3 both have 8 elements. Other periods are longer.

A column of elements down the table is called a group. There are 18 groups in the standard periodic table. Each group has a number: from 1 to 18. Elements in a group have electrons arranged in similar ways, which gives them similar chemical properties (they behave in similar ways). For example, group 18 is known as the noble gases because they are all gases and they do not combine with other atoms.

The periodic table can be used by chemists to observe patterns, and relationships between the elements. For example, elements to the bottom and far left of the table are the most metallic, and elements on the top right are the least metallic. (e.g. cesium is much more metallic than helium). There are also many other patterns and relationships.

There are three systems of group numbers; one using Arabic numerals (1,2,3) and the other two using Roman numerals (I, II, III). The Roman numeral names were used at first and are the traditional names; the Arabic numeral names are newer names that the International Union of Pure and Applied Chemistry (IUPAC) decided to use as well. The IUPAC names were meant to replace the older Roman numeral systems as they used the same names to mean different things, which was confusing.

The Periodic Table was invented and arranged by the Russian chemist Dmitri Mendeleev ( 1834- 1907).

## Standard periodic table

 ក្រុម → ខួប ↓ 1 H 2 He 3 Li 4 Be 5 B 6 C 7 N 8 O 9 F 10 Ne 11 Na 12 Mg 13 Al 14 Si 15 P 16 S 17 Cl 18 Ar 19 K 20 Ca 21 Sc 22 Ti 23 V 24 Cr 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 31 Ga 32 Ge 33 As 34 Se 35 Br 36 Kr 37 Rb 38 Sr 39 Y 40 Zr 41 Nb 42 Mo 43 Tc 44 Ru 45 Rh 46 Pd 47 Ag 48 Cd 49 In 50 Sn 51 Sb 52 Te 53 I 54 Xe 55 Cs 56 Ba * 72 Hf 73 Ta 74 W 75 Re 76 Os 77 Ir 78 Pt 79 Au 80 Hg 81 Tl 82 Pb 83 Bi 84 Po 85 At 86 Rn 87   Fr 88 Ra ** 104 Rf 105 Db 106 Sg 107 Bh 108 Hs 109 Mt 110 Ds 111 Rg 112 Cn 113 Uut 114 Uuq 115 Uup 116 Uuh 117 Uus 118 Uuo * Lanthanides 57 La 58 Ce 59 Pr 60 Nd 61 Pm 62 Sm 63 Eu 64 Gd 65 Tb 66 Dy 67 Ho 68 Er 69 Tm 70 Yb 71 Lu ** Actinides 89 Ac 90 Th 91 Pa 92 U 93 Np 94 Pu 95 Am 96 Cm 97 Bk 98 Cf 99 Es 100 Fm 101 Md 102 No 103 Lr

Chemical Series of the Periodic Table

• Alkali metals
• Alkaline earths
• Lanthanides
• Actinides
• Transition metals
• Poor metals
• Metalloids
• Nonmetals
• Halogens
• Noble gases

State at standard temperature and pressure

The colour of the number ( atomic number) above the element symbol shows the state of the element at normal conditions.

• those in blue are gases
• those in green are liquids
• those in black are solid

Radioactivity

• those with solid borders have stable isotopes ( Primordial elements)
• those with dashed borders have only radioactive naturally occurring isotopes
• those with dotted borders do not occur naturally ( Synthetic Elements)
• those without borders are too radioactive to have been discovered yet.
Other Languages
Acèh: Drah kimia
Afrikaans: Periodieke tabel
Alemannisch: Periodensystem
العربية: جدول دوري
asturianu: Tabla periódica
Boarisch: Periodnsystem
беларуская (тарашкевіца)‎: Пэрыядычная сыстэма хімічных элемэнтаў
বিষ্ণুপ্রিয়া মণিপুরী: পর্যায় সারণী
Mìng-dĕ̤ng-ngṳ̄: Nguòng-só ciŭ-gĭ-biēu
Cymraeg: Tabl cyfnodol
ދިވެހިބަސް: ޕީރިއަޑިކް ތާވަލު
Esperanto: Perioda tabelo
Gàidhlig: Clàr pillteach
ગુજરાતી: આવર્ત કોષ્ટક

Fiji Hindi: Periodic table
Bahasa Indonesia: Tabel periodik
íslenska: Lotukerfið

Gĩkũyũ: Metha Njokereri
한국어: 주기율표
lumbaart: Taula periodica
Baso Minangkabau: Tabel periodik
Bahasa Melayu: Jadual berkala
Plattdüütsch: Periodensystem
नेपाल भाषा: तत्त्वमां
Nederlands: Periodiek systeem
norsk nynorsk: Periodesystemet
Papiamentu: Mesa periodiko
Piemontèis: Tàula periòdica
português: Tabela periódica
tarandíne: Tavele Periodiche
srpskohrvatski / српскохрватски: Periodni sistem elemenata
Simple English: Periodic table
српски / srpski: Периодни систем
Sranantongo: Periodiki sistemi
Basa Sunda: Tabél periodik
Kiswahili: Mfumo radidia
Türkçe: Periyodik tablo
oʻzbekcha/ўзбекча: Kimyoviy elementlar davriy sistemasi
Tiếng Việt: Bảng tuần hoàn
West-Vlams: Periodiek système
Bân-lâm-gú: Chiu-kî-piáu