Here is the summary. (Save time) 2:25 Discovery in the Field of Atoms. 4:46 Sub-atomic particles 10:28 Numbers/Symbols related to atoms. 15:15 Model of an atom- Thompson's model 19:29 Rutherford's model of an atom. 32:36 Bohr's model 33:26 Energy Shells 32:15 Neutrons 35:04 Electronic distribution 40:12 Valency 51:51 Compounds formation 57:22 Mass number/Atomic Number 1:00:16 Isotopes/Isobars/Isotones Good luck juniors now i am in class 11th. Class 9th was a great journey for me.
Here is the summary. (Save time) 2:25 Discovery in the Field of Atoms. 4:46 Sub-atomic particles 10:28 Numbers/Symbols related to atoms. 15:15 Model of an atom- Thompson's model 19:29 Rutherford's model of an atom. 32:36 Bohr's model 33:26 Energy Shells 32:15 Neutrons 35:04 Electronic distribution 40:12 Valency 51:51 Compounds formation 57:22 Mass number/Atomic Number 1:00:16 Isotopes/Isobars/Isotones
🎯 Key Takeaways for quick navigation: 01:30 🧠 *Concepts are introduced in the second chapter, and climaxes of those concepts are revealed in subsequent chapters, creating an interconnected structure.* 03:38 🏛️ *The video delves into the structure of the atom, explaining the journey of scientific discovery that led to the current understanding.* 09:16 🌐 *The mass of protons and neutrons is approximately 1000 times greater than the mass of electrons, explaining why atomic mass is primarily determined by protons and neutrons.* 11:56 🤓 *Remembering that 'A' stands for atomic number in the alphabet and 'S' is for mass number aids in understanding and distinguishing these two important characteristics of atoms.* 12:25 ⚖️ *If 'A' is not the atomic number, then 'A' is the mass number, and 'Z' is the atomic number.* 12:39 ⚡ *Atomic number is the total number of electrons and protons in a given element.* 13:22 ⚛️ *Atomic number can be any positive integer, representing the number of protons in an atom.* 13:47 🤔 *When in doubt, consider the number of protons in the atom to determine the atomic number.* 14:45 🔄 *Choose the mass of an atom by considering protons and neutrons, as electrons have negligible mass.* 15:00 📚 *Formula: Mass Number = Number of Neutrons + Number of Protons.* 15:14 🧬 *Early atomic models, like Thomson, Rutherford, and Bohr, helped understand atomic structure.* 15:54 🧲 *Thomson's model was simple, considering an atom as a positively charged sphere like a watermelon. It lacked details about subatomic particles.* 16:23 🤔 *Thomson proposed a model where atoms resembled a positively charged sphere with electrons embedded, akin to fruits within a pudding.* 16:49 💡 *Rutherford's model corrected Thomson's by suggesting a concentrated positive charge at the atom's center (nucleus) and electrons surrounding it.* 17:17 ⚖️ *Rutherford's model explained that electrons orbit the nucleus, and atoms are electrically neutral, with equal positive and negative charges.* 18:02 🌐 *Electrons were introduced by Thomson, identified as negatively charged particles; later, Rutherford explained the atomic structure, including protons.* 19:12 🌌 *Rutherford's model, based on the gold foil experiment, revealed that atoms have a concentrated positive charge (nucleus) and are mostly empty space.* 19:27 🧪 *Rutherford challenged Thomson's atomic model through experiments, emphasizing practical demonstration.* 23:26 ⚛️ *Gold atoms act as a target, and the experiment involves studying the deflection of alpha particles when they collide with gold atoms.* 23:42 🔍 *Magnification of the atomic level reveals interactions and collisions, helping understand the behavior of particles like helium within atoms.* 24:24 📏 *The thickness (thikness) of the gold foil is crucial for the experiment, as extremely thin sheets allow for interactions and observations at the atomic level.* 26:22 🌐 *The choice of gold foil facilitates the examination of atomic structures by focusing on the maximum properties of atoms and their spatial distribution.* 26:50 🤔 *Helium (He) has a positive charge, and if an alpha particle deflects, it indicates an interaction with a positive charge.* 27:05 ⚖️ *Understanding the principles of attraction and repulsion: North pole repels north pole but attracts south pole; similarly, positive charges repel, and opposite charges attract.* 27:19 🔄 *Helium (He) moving towards another positive charge implies a change in direction, indicating a collision or deflection.* 28:01 🎯 *The concept of a "nucleus" arises, emphasizing that positive charge and mass are centrally located, surrounded by mostly empty space.* 29:25 🌌 *Bohr's model: Nucleus as the proton-containing center, electrons orbiting with constant velocity, addressing issues raised by Max Planck.* 30:48 💡 *Acceleration causes a decrease in personal energy over time, impacting the stability of charged particles.* 33:44 🌐 *The video discusses the arrangement of electrons in different orbitals around the nucleus, using the example of KLAMN notation.* 33:58 ⚛️ *The concept of representing orbitals with quantum numbers (n, l, m, s) is introduced, determining the location and distribution of electrons.* 34:54 ⚡ *Understanding how electrons are distributed in different orbitals within an atom is essential for comprehending the structure of atoms and molecules.* 35:09 📚 *The speaker illustrates the distribution of electrons in orbitals using sodium (Na) as an example, referring to the periodic table for information.* 35:23 🌐 *The video emphasizes the importance of understanding the concept of electron distribution in orbitals for grasping atomic structure.* 36:06 🌌 *Comparing the sizes of different orbitals and colonies to convey the concept that more distant orbitals can accommodate more electrons.* 37:02 🧮 *Bohr's formula determines the capacity of electron shells: \(2n^2\), where \(n\) is the shell number.* 37:31 📚 *Understanding electron distribution in shells using the formula \(2n^2\): first shell (2 electrons), second shell (8 electrons), third shell (18 electrons), and so on.* 38:41 🏡 *Analogy of electron filling with building colonies, where the first one is filled, then the next, creating stability.* 39:53 🤔 *Valency discussion: Valency is the combining capacity of an atom, focusing on stability in the outermost shell.* 41:47 🛠️ *Stability in life is akin to atoms seeking stability. Atoms also desire stability, and stability for them means completing the octet rule.* 42:22 🧠 *The octet rule implies that atoms aim to fill their outermost shell with eight electrons, ensuring stability.* 42:36 🌐 *Achieving stability is about filling the outermost shell; exceptions exist for elements with only two electrons in their outer shell.* 42:51 🧪 *Atoms with more than two electrons follow the octet rule, prioritizing stability by filling their outermost shell.* 43:32 🧮 *Balancing electrons involves determining the needed electrons for stability, considering the existing electrons in the atom.* 43:54 ⚖️ *Using the example of sodium, with 11 electrons, balancing involves filling the outermost shell and determining the electrons required in subsequent shells.* 44:22 🤔 *Understanding the electron distribution in successive shells helps determine the stability of an atom and its fulfillment of the octet rule.* 45:16 🤯 *Sodium's options with an extra electron and understanding electronic configuration.* 45:46 💡 *Simplified explanation of sodium's electronic configuration.* 46:58 🧠 *Drawing an analogy with choosing between a heavy and light box to understand sodium's preference.* 47:11 🤓 *Further explanation of sodium's preference using a practical example.* 47:53 ⚖️ *Balancing electrons to achieve stability in the case of chlorine.* 48:35 🤷♂️ *Wrapping up the explanation of sodium and chlorine interaction for electron stability.* 49:16 ⚖️ *Sodium transfers an electron to chlorine in the formation of NaCl, resulting in Na⁺ and Cl⁻ ions.* 49:30 🧮 *Valency is determined by the number of electrons an atom gains or loses during bonding.* 51:03 🧑🔬 *Examples of valency calculations for Nitrogen, Phosphorus, Boron, and others are explained.* 52:13 🧪 *Verify the valency of elements in a compound by referring to their atomic structure and electron distribution.* 53:10 🤝 *Chemical interaction dialogue: Chlorine and magnesium discussing electron exchange.* 53:40 🤝 *Magnesium and chlorine agree to exchange electrons, forming MgCl2.* 54:24 🤝 *Aluminum bonds with three chlorines, forming AlCl3.* 55:33 🤔 *Emphasis on achieving stability in chemical bonding over maintaining neutrality.* 56:43 🤝 *Explaining the concept of electron transfer in compounds, using sulfur (S) as an example.* 56:58 🧠 *Providing a fundamental approach to creating compounds, mentioning aluminum and nitrate as examples.* 57:55 🔄 *Emphasizing the importance of following alphabetical order when representing elements.* 58:58 ⚖️ *Calculating the number of neutrons in an atom based on its atomic and mass numbers.* 01:00:39 🧲 *Atomic number defines isotopes, while mass number varies.* 01:01:36 🧾 *Protium, deuterium, and tritium are examples of different hydrogen isotopes.* 01:01:50 📊 *Average atomic mass is calculated by considering the abundance of isotopes.* 01:02:04 📈 *Carbon isotopes, like 12C6 and 14C6, have different mass numbers.* 01:02:19 📚 *Calculating the average mass involves finding the weighted average based on isotopic abundance.* 01:02:49 🔍 *Chlorine isotopes with mass numbers 35 and 37 can be used to find their ratio.* 01:03:17 📝 *Calculating the exact percentage of isotopes involves simple mathematical operations.* 01:04:40 🤔 *Atomic numbers uniquely identify elements, while isotopes have different mass numbers for the same element.* 01:06:18 🔍 *Isotones have the same number of neutrons but different atomic numbers, illustrated through the comparison of Potassium and Calcium isotones.* Made with HARPA AI
Bhaiya app ne hamare liye kitna kuch Kia hai attendance miss ki aur b bhut kuch app hamare liye Diamond se b jayada mulyavan ho hai hum log b annual exm Mai 90% + score karenge bhai love you
Summary 2:25 discovery in field of atom 4:46 sub - atomic particles 10:28 number related to atoms 15:15 model of atom - Thomsons model 19:29 Rutherford model 32:36 bohrs model 33:26 energy shells 32:15 neutrons 35:04 electronic distribution 40 :12 valency 51:51 compounds formation 57:22 mass number/ atomic number 1:00:16 isotopes/ isobars/ isotones
Time stamp 41:23 Bhaiya you help the students to much so all of us who got outstanding performance they definately gave you blessings Thanks for so much likes
@@bomtemtayeng5209 Abe google kar ke dekh pata chalega kiski english aachi hai or kiski nhi RU-vid pata nhi ye chotte baccho ko jinhe apna asli name batana mei sharam aati hai or aata jata kuch nhi bas aagar koi sahi likh rha hai taab bi khud ko reach (popularity) mila isliye kuch bhi likh dete hai Abe delete kar da apna comment or chup chap padhai kar le mene to 1 year phele hi karle 9 th complete tu soch tera kya hoga By the way i am very kind person & full support for pranay bhaiya aab 10 th me hu taab bhi khata hu 9th ka teacher me sabse best (legendary) sir hai ye
The greatest man in the world who teaches with humor, simplicity and friendliness. Also gave practical examples when needed and completed the chapter in reasonable time 😊. Thank you sir for this wonderful session 😁 🫡. 05:32 WOW! 🤣🤣
i literally wasted my 9th class now that 10th boards are near and i have to clear my previous concepts in order to understand new ones . I started looking for 9th chemistry explanation and this is the best video i found so far, understood everything. hats off to you pranay bhaiya. im so thankful rn . the best teacher.Loved your video
hlo kaisi chal rhi h preparation bro kya mujhe ye bta skte ho ki manage kaise kru sare subjects ko or kaise sb revise karun mujhe bohot dikkat ho rhhi hai 😓
Yesss bhaiya you are 200%right You like our friend and you treat us as our big bro So we all are like you and your lectures and your funny talks LOVE U to all just padle family members And we also the member of JUST PADLE family ❤❤❤❤😊😊😊😊😊😊😊😊 AM I RIGHT
Thankyou bhaiya for this energetic video 😊😉🥰... we really appreciate how much efforts you put in to not only make us understand topics but also help us develop an interest in the same ... it's just a small request that can you also provide notes of chapters like patrolism , democratic rights , etc as these were unavailable on the official site ... thankyou 🙃👌
Hello sir, I'm waiting for you to make videos on ssc Nazism,Pastoralists and Forest society of history because sir no one can make me understand these topics better than you. I'll be waiting... Sending love and Happiness ❤️
I was just looking for this chapter's easiest explanation as I just suck at chemistry and I have test on Monday...just after 15 minutes scrolling and scrolling j got your new video notification and it was the chapter I wanted like bhaiyaaa you slayyyyy🤌🥺🫂
Tomorrow is my final exams and i got 2 days of study holiday but i wasted yesterday by watching reels😎 and here i am today watching lectures and trying to complete whole syllabus 😂, please wish me luck (anyway i am the topper of my class )
