The periodic table | Atoms, elements, and the periodic table | High school chemistry | Khan Academy

The periodic table organizes elements into groups and periods based on their chemical and physical properties. Elements in the same group share similar characteristics, like reactivity. The table is divided into metals, nonmetals, and metalloids, each with distinct properties. Key groups include alkali metals, alkaline earth metals, halogens, and noble gases.

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[margaridavelhinho]

TIMESTAMPS

Groups 0:09 - 1:31
Periods 1:32 - 2:14
Alkali Metals 2:15 - 3:25
Alkaline Earth Metals 3:26 - 4:01
Properties of Metals in General 4:02 - 4:50
Properties/Contrast with Nonmetals 4:51 - 5:11
Halogens 5:12 - 5:52
Noble Gases 5:53 - 6:17
Not really specific, lil summary 6:18 - 6:42
Metalloids (The Zigzag Line) 6:43 - 8:38
Outro 3:39 - 8:55

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[chloebutler]

I was gonna make a sodium joke, but Na.
Ok I have a different one:
2 scientists walk into a bar. One says, "I want H20." The other says, "I want H20 too".
The second one dies.
Ok, here's a potassium joke. What, you don't want to hear it? K.
Periodic table puns are funny, AmIrITe?

[arcticpossi_schwsiantuntija]

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[chemistryandscience]

There are four blocks namely S, P, D and F in the Modern Periodic table. Element are classified into four Blocks on the basis of valence shell electronic configuration. Those elements which have their outer most sub shell is S, constitute to form S block. Similarly p, d and f blocks are formed on the basis of outermost valence subshells p, d and f.

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