Periodic Properties L3 | Chemistry | Just NEET | Ashwani Sir

The periodic table is an arrangement of all the elements known to man in accordance with their increasing atomic number and recurring chemical properties. They are assorted in a tabular arrangement wherein a row is a period and a column is a group.

Elements are arranged from left to right and top to bottom in the order of their increasing atomic numbers. Thus;

Elements in the same group will have the same valence electron configuration and hence similar chemical properties.
Whereas, elements in the same period will have an increasing order of valence electrons, therefore, as the energy level of the atom increases, the number of energy sub-levels per energy level increases.
The first 94 elements of the periodic table are naturally occurring, while the rest from 95 to 118 have only been synthesised in laboratories or nuclear reactors.

Dimitri Mendeleev is widely referred to as the father of the periodic table as he put forth the first iteration of the periodic table similar to the one we use now. However, Mendeleev’s periodic law is different from the modern periodic law in one main aspect:

Mendeleev's periodic table is based on the increasing atomic mass, whereas, the modern periodic law is based on the increasing order of atomic numbers.

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[ROHAN-]

🥳🥳GOOD NEWS 💐💐
For 2021 : GENIUS BATCH 💕🙏
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THANKS ASHWANI SIR💐💐 💕💕❤

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Amazing Lecture Sir....every is crystal clear

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sir u r just amazing i have no words to say something about u

[GursimranSingh-ftig]

Correction 20:00 :- Agar oxide/ hydroxide acidic aur basic dono bn gye toh amphoteric hain aur agar koi nhi toh neutral. Lekin haan unhone bhi sahi bola.

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sir please don't leave us in middle atleast stay with us one year from now till neet 2021 🙏🙏🙏🙏

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sir plzz do make a session for organic conversion

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SIR APKA UNACADEMY PE COURSE KAB AA RHA HAI PLZ BATA DIJIYEE NA SIR

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Koi mujhe Ashwani sir ke lectures ki roz ki timing clear kar do?😐🤨

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Sir apki sayari k hum dewane h
Or NEET k piche paagal hai

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Sir poori organic pehle Kara dijiye ek Baar
Mai goprep par aapko follow Kar rahi thi par aapko video aani band hi gayi ....tab pata Chala aap Yaha aa Gaye Hain ...
Sir organic Kara dijiye plzz ek ek Baar mei..