How to write in ionic form, how to write the electronic formula of ion

Writing format of the ion symbol: in the element orAtomic clustersThe upper right corner indicates the number of lost or gained electrons, and the lost electrons are positively charged; The electroosmotic segment of the limb flame is negatively charged.

For example: Fe loses 3 electrons Fe3+ and loses 2 electrons Fe2+; The sulfur element gives 2 electrons S2- and gives 4 electrons S4-; Hydroxide oh-, sulfate.

so4)2-。

Ion Note: The amount of charge contained in the ion crystal.

Equal anions.

and cations, and these two ions are arranged alternately, neatly and regularly, often showing a regular geometric shape. For example, NaCl crystals present a cubic spatial configuration, with 6 nearest equidistant CLs around each Na+.

na+[:o:h]；

Note: The two pairs of electrons above and below are both oxygen atoms, and the + and signs are both superscripts.

In a chemical reaction, it is generally the outer electrons of an atom that change. For the sake of simplicity, black dots are often used around element symbols in chemistry"and fork" to denote the outermost electrons of the element's atom.

The formula of the substance represented in this way is called the electronic formula. However, the electronic formula of the classical octagram studied in secondary school is an outdated theory that can only be used to represent a small number of substances formed by the main group elements, not from transition elements, and cannot correctly represent the structure of many common substances.

The ionic formula for elements 1 to 20 is written like this:h+、he、li+、be2+、b3+、c4+、n3-、o2-、f-、ne、na+、mg2+、al3+、si4+、p3-、s2-、cl-、ar2+、k+、ca2+。is a list of chemical elements sorted by atomic weight, from smallest to largest.

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The electronic formula of an ion is the chemical formula that represents the outermost electro-positron structure of a particle. Usually around the element symbol, small black dots such as " or " " are used to indicate the number of outermost electrons of the atom or ion of the element. The electronic formula can be used to represent atoms, ions, elemental molecules, as well as covalent compounds, ionic compounds and their formation processes.

Writing electronic slag wheel should pay attention to:

1. No matter what kind of particle, its electronic formula is composed of atoms as the basic unit, and there can be no corner code or even coefficient.

2. The electronic formula of each atom that makes up various particles must be uniform and symmetrical. The stable 8-electron structure is usually represented as four pairs of electrons (usually one pair of electrons at the top, bottom, left, and right of the element symbol).

3. The electronic formula can only be used to represent the substance formed by the main group elements, and cannot represent the substance formed by the transition elements.

Notation atom:. (one point in the middle) The outermost electrons are evenly arranged around the atom. Note: Electrons are first singled and then doubled. Simple cation: The electronic formula of a simple cation is its ionic symbol such as na+ (the plus sign is in the upper right corner);

The electronic formula of anion: the anion is added in parentheses, and the electronic charge cannot be less, which indicates how many units of negative charge the anion as a whole, and there should be factors such as easy to distinguish, the ion of the single nucleus is not obvious, and the ion of the polyatomic nucleus is obvious.

The ionic symbols for elements 1 to 20 are:: H+, He, Li+, BE2+, B3+, C4+, N3-, O2-, F-, Ne, Na+, Sakutaka MG2+, Al3+, Si4+, P3-, S2-, Cl-, AR2+, K+, Ca2+.

The valency is in the upper right corner of the element, and it is also necessary to indicate whether it is a positive or negative ion and is represented by +,-; Ionic electronic formula: write the element symbol first, the number of small black dots around it to achieve a stable structure, and add parentheses (anions plus, cations do not add) It is best to mark positive and negative in the upper right corner.

Complex cations (e.g., NH4+, H3O+, etc.) should be marked with brackets in addition to shared electron pairs, non-shared electron pairs, etc., and the charge of the ions should be marked at the top right of the parentheses.

The concept of ionic bonds is the chemical bond formed by the electrostatic action of anions and cations. Compounds bonded by ionic bonds are called ionic compounds. The electronic formula of ionic compounds is marked by the composition of the anion and cation ions.

Writing rules and formulas: more outside, less inside, small outside, big inside, yin and yang.