លំហាត់បញ្ចប់ជំពូក២ តារាងខួបនៃធាតុគីមី គីមីវិទ្យាថ្នាក់ទី១០ - Exercise for Chapter II : Periodic Table of Elements

លំហាត់ស្រាវជ្រាវ សម្រាប់គីមីវិទ្យាថ្នាក់ទី១០ បញ្ចប់ជំពូកទី២ តារាងខួបនៃធាតុគីមី
រៀបរៀងដោយលោកគ្រូ ប៊ុត ចាន់វាស្នា បរិញ្ញាបត្រគីមី
មានទទួលបង្រៀនត្រៀមប្រឡងនានា បង្រៀនដល់ផ្ទះ ទំនាក់ទំនង 093 38 01 02

ចូលទៅកាន់ Link ខាងក្រោម ប្អូនៗនិងទទួលបានលំហាត់ថ្មីៗ
https://drive.google.com/file/d/1VbILMevrySq5pVzNSoeVTuZe107VyoZw/view

History of Dalton's Atomic Theory

Despite the fact that the idea of the iota goes back to the thoughts of Democritus, the English meteorologist and scientific expert John Dalton detailed the main present day portrayal of it as the crucial building square of synthetic structures. Dalton built up the law of numerous extents (first introduced in 1803) by contemplating and developing crafted by Antoine Lavoisier and Joseph Proust.

Proust had contemplated tin oxides and found that their masses were either 88.1% tin and 11.9% oxygen or 78.7% tin and 21.3% oxygen (these were tin(II) oxide and tin dioxide individually). Dalton noted from these rates that 100g of tin will consolidate either with 13.5g or 27g of oxygen; 13.5 and 27 frame a proportion of 1:2. Dalton found a nuclear hypothesis of issue could exquisitely clarify this regular example in science – on account of Proust's tin oxides, one tin iota will join with it is possible that a couple of oxygen particles.

Dalton additionally accepted nuclear hypothesis could clarify why water ingested distinctive gases in various extents: for instance, he found that water consumed carbon dioxide far superior than it retained nitrogen. Dalton estimated this was because of the distinctions in the mass and many-sided quality of the gases' particular particles. In reality, carbon dioxide particles (CO2) are heavier and bigger than nitrogen atoms (N2).

Dalton recommended that every synthetic component is made out of particles of a solitary, one of a kind sort, and however they can't be modified or annihilated by substance implies, they can join to shape more mind boggling structures (concoction mixes). Since Dalton achieved his decisions by experimentation and examination of the outcomes in an exact manner, this denoted the main really logical hypothesis of the particle.

Dalton’s Atomic Theory

The main points of Dalton’s atomic theory are:

Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed.
1-All atoms of an element are identical.
2-Compounds are produced through different whole-number combinations of atoms.
3-The atoms of different elements vary in size and mass
4-A chemical reaction results in the rearrangement of atoms in the reactant and product compounds.
5-Atomic theory has been revised over the years to incorporate the existence of atomic isotopes and the interconversion of mass and energy. In addition, the discovery of subatomic particles has shown that atoms can be divided into smaller parts. However, Dalton’s importance in the development of modern atomic theory has been recognized by the designation of the atomic mass unit as a Dalton.

Cambridge International AS and A Level Chemistry Coursebook 2nd Edition

សូមប្អូនៗ ចូល Link ខាងក្រោមនេះប្អូននឹងទទួលបានសៀវភៅគីមីវិទ្យាមួយ ដែលមានអត្ថប្រយោជន៍ដល់ប្អូនៗដែលកំពុងរៀននៅថ្នាក់វិទ្យាល័យ និងអ្នកដែលស្រាវជ្រាវទាក់ទងនិងគីមី ព្រោះចំពោះមេរៀននីមួយៗមានការពន្យល់ច្បាស់លាស់ និងអមមកជាមួយនូវឧទាហរណ៍ និងលំហាត់បញ្ចប់មេរៀន សម្រាប់មេរៀននីមួយៗ 

Download link :

https://www.gceguide.xyz/files/e-books/a-level/Cambridge%20International%20AS%20and%20A%20Level%20Chemistry%20Coursebook%202nd%20Edition.pdf

What's Complex Compound?

A Coordination Complex is a substance in which a transition metal atom or ion accepts electrons from a group of neutral molecules or anion called “Ligands”. Zinc, Cadmium and Mercury doesn’t transition metals but they can make a complex compound because of the two s orbital electrons. Zn, Cd, and Hg are always going to exist in their +2 state in complex, or coordination compounds- simply because a fully occupied d orbital is extremely stable. The two s orbital electrons are responsible for these metals forming coordination compounds. A complex can be a cation ion, an anion ion, or neutral molecules. The symbol of

-        A cation complex is [Transition Metal (ligands)]Non-Metal or [Transition Metal (ligands)]⁺ⁿ.

-        An anionic complex is Metal[Transition Metal (ligands)] or [Transition Metal (ligands)]^-n.

-        A neutral complex is [Transition Metal (ligands)] or Transition Metal (ligands)

“ n ” is the charge of complex compound.

For example: K₂[Fe(CN)₄] is an anionic complex. [Cr(NH₃)₃(H₂O)₃]Cl₃ is a cation complex. Fe(CO)₅ is a neutral complex compound.

ការហៅឈ្មោះរបស់អាល់កានតាម IUPAC ភាគ០១ -IUPAC Nomenclature of Alkanes: Part 1

How to determinate the isomer Z-E : ការកំណត់អ៊ីសូមែរុបសណ្ឋាន Z ឬ E

How to write the formula of ester compound-របៀបសរសេររូបមន្តស្ទើលាតរបស់អេស្ទែ សម្រាប់ត្រៀមប្រឡងបាក់ឌុប

វីដេអូបង្ហាញពីការសរសេររបាយអេឡិចត្រុង ឬទម្រង់អេឡិចត្រូនិចរបស់អាតូម-How to write electron configurations and what they are