"Electron Configuration Outside the Atomic Nucleus" PPT courseware of particles constituting matter

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"Electron Configuration Outside the Atomic Nucleus" PPT courseware of particles constituting matter

1. The arrangement of electrons outside the nucleus (layered arrangement)

1. The relationship between the electron energy and the distance from the nucleus:

one two three four five six seven

Electronic shell K L M N O P Q

Far from the nucleus, near, far

Energy high low low high

2. Schematic diagram of atomic structure

Electrons outside the nucleus are arranged in layers

⑴The first layer can hold up to ___ electrons, and the second layer can hold up to __ electrons.

(2) The outermost shell does not exceed ____ electrons

⑶Electrons first fill the electron shell with energy ____, and then move into the electron shell with slightly ____ energy

The schematic diagram of the atomic structure of an element is

The nuclear charge of this element is _____,

There are _____ electron shells outside the nucleus,

There are _____ electrons on the second level,

There are _____ electrons in the outermost electron shell,

The element symbol is _____ element.

2. Ions: charged atoms or groups of atoms.

Atoms gain electrons to form anions;

Atoms lose electrons to form cations.

The charge of an ion is equal to the number of electrons lost (gained) by the atom (atom group).

Cation ( + ) Atom Anion ( - )

How to express ions

Mark the number of charges in the upper right corner of the element symbol. The value comes first and the symbol comes last. 1 can be omitted. Such as: Na＋Mg2＋Cl- O2-

Particle structural characteristics

In an atom: Nuclear charge Number of protons Number of electrons outside the nucleus

Cation: Nuclear charge Number of protons Number of electrons outside the nucleus

Anion: Nuclear charge Number of protons Number of electrons outside the nucleus

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Update Time: 2024-10-08

This template belongs to Chemistry courseware Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 1 industry PPT template

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