From 69ccb5a0de3740b906492c80679fd3ffa3b53687 Mon Sep 17 00:00:00 2001 From: phidias Date: Wed, 11 Feb 2026 15:07:18 +0000 Subject: [PATCH] docs: update education/chemistry/1 --- education/chemistry/1.html | 50 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 48 insertions(+), 2 deletions(-) diff --git a/education/chemistry/1.html b/education/chemistry/1.html index 111d358..a4bd8f8 100644 --- a/education/chemistry/1.html +++ b/education/chemistry/1.html @@ -2,10 +2,56 @@ title: 1 description: published: true -date: 2026-02-11T14:58:54.870Z +date: 2026-02-11T15:07:17.596Z tags: editor: ckeditor dateCreated: 2026-02-11T14:58:54.870Z --> -

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Bohr model (1913)

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ParticleSymbolRelative ChargeMass Unit
Electrone--15.4858 x 10-4
Protonp++11.0073
Neutronn01.0073
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Protons = Electrons ⇒ Atom. Neutral.

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Protons ≠ Electrons ⇒ Ion. Charged.

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Electrons are surrounding the nucleus, consisting of protons and neutrons.

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Element

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Mass number are the number of protons and neutrons in the nucleus.

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Atomic number are the number of protons in nucleus.

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For example, 42He, where mass number is written on top left, and atomic number on bottom left.

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Periodic Table

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The elements are arranged in the order of increasing atomic number, from left to right, from up to down.

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Each element has a unique atomic number (or the number of proton).

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Electronic arrangement