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Course: Class 10 Chemistry (India) > Unit 5
Lesson 1: Modern periodic tableThe modern periodic table
The modern periodic table is based on the periodic law: "The chemical properties of elements are a periodic function of their atomic number." Let's see how is this different from Mendeleev's periodic table and how this solves for its predecessor's limitations.
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Created by Ram Prakash. Created by Ram Prakash.
Want to join the conversation?
- Are there lesson videos on Doberemier's triads and Newland's law of octaves?(4 votes)
- Why are the lanthanides and actinides placed the way they are?(1 vote)
- Lanthanides and actinides are placed separately at the bottom of the periodic table as per their different properties and the block in which electrons get filled. The reason for this placement has to do with the electron configurations of these elements.(2 votes)
- When were noble gasses discovered?(1 vote)
- Between the period of 1869-2002, Noble gases were discovered. Refer to below for more info:
1) Helium - 1869
2) Neon - 1898
3) Argon - 1894
4) Krypton - 1898
5) Xenon - 1898
6) Radon - 1900
7) Unnoctium - 2002
You can learn anything!(2 votes)
- Ram said that number of protons is not directly related to number of electrons but for neutral atoms they are equal right! what about that?(1 vote)
- Is there any video on Mendeleev Periodic Table?(1 vote)
- At1:00, Ram sir says that the earlier scientists had no clue about atomic number, electrons, protons and so on. If they didn't know those, then how do they know about the atomic mass. Even though the protons and all were discovered in the later years, how did they find the atomic mass?(0 votes)