SOS: Can anyone tell me the basics of electrons, atoms, ions, and electronic bonds?

An atom is the smallest unit of chemical change, an atom is made up of a positively charged nucleus and negatively charged electrons moving around the nucleus, there are protons and neutrons in the nucleus, and the proton carries one unit positive charge.

An electron is a type of particle in an atom. It is denoted by e, with one unit of negative charge.

Charged atoms or clusters of atoms are called ions. Such as h+, k+, f-, etc.

Electronic bonds (commonly known as chemical bonds) A strong interaction between two or more adjacent atoms (or ions) is called a chemical bond. Chemical bonds are mainly divided into ionic bonds, covalent bonds, and metallic bonds.

Study hard!

Upstairs you're wrong.

A molecule is the smallest unit in a chemical change.

Middle school chemistry is simple.

There are several types of reactions that you should remember: decomposition, compounding, and neutralization.

Remember the basic chemical and physical properties of several substances: C, H, O, CO2, HCl, H2SO4

There is also an understanding of the basic characteristics of the periodic table and the top 20 elements.

I don't remember the rest very well.

You'd better find your own junior high school textbooks and read them, I haven't been to school for 4 or 5 years.

1) Each electron has a unit negative charge, the mass is negligible, and in the atom its number is equal to the number of protons and the number of nuclear charges; In the case of ions, the number of electrons = the number of protons + the number of charges (anions), the number of electrons = the number of protons - the number of charges (cations).

2) The smallest particles in a chemical reaction, composed of protons, neutrons, and electrons, are not electrically sensitive.

3) Ions have simple ions and ion clusters, and their generation is caused by the electron gain and loss of atoms.

4) Ionic compounds must have ionic bonds, and may have covalent bonds (generally speaking, the compounds formed by metals and nonmetals are ionic compounds, but if AlCl3 contains covalent bonds), the compounds formed by nonmetals and nonmetals are only covalent bonds, and the non-polar covalent bonds formed by cutting non-metallic elements; Compounds formed by different non-metals form polar covalent bonds, because different atoms have different electron attraction capabilities, so the electron pairs will be offset.

Addendum: The reflection is not only decomposition, compounding, and metadecomposition, but also the reaction due to redox in high school. Molecules that make up substances such as:

O2) ions can also form substances, such as: (NaCl) atoms can directly constitute substances and can also form molecules. Electronic bonds, also known as chemical bonds, are divided into ionic and covalent bonds.

Covalent bonds are further divided into polar and non-polar bonds. Substances that are made up of ionic bonds are called ionic compounds. Substances that are made up of covalent bonds are called covalent compounds.

There are only covalent bonds in covalent compounds, and there must be ionic bonds in ionic compounds. Possibly by covalent bonds. It is beneficial to memorize the 7 main groups of the periodic table.

The atom gains electrons to form anions, the atoms lose electrons to form cations, and due to the chemical reaction, electrons outside the nucleus decrease or increase to form chemically stable ions...

Cation. Anion. Charged atoms are called ions.

I'm not sure the answer, so I'll give you a reference.

It is a product of oxidation or reduction!

When an atom loses its electron, it has a positive charge and becomes a cation. When an atom gains an electron, it has a negative charge and becomes an anion.

Ions are charged atoms or clusters of atoms, atoms or clusters of atoms lose electrons to form cations, such as Na+, NH4+, and clusters of atoms or atoms gain electrons, forming anions such as Cl-, No3-

Atoms or clusters of atoms, positively charged, yang, k+ or NH4+, negatively charged, yin, cl- or oh-

Anionic, cationic, positively charged, positive, H, negatively charged, anical, O2

Read the book yourself... It's boring.

The symbol of the writing type Sun out of a ion is A2- The symbol of the b ion is B3+ In the compound, the valence of a is -2 The valency of element b is +3 The chemical formula of the compound formed by the two is B2A3

An ion becomes an atom after losing two electrons, then the ion is an (anion), or it may be that the (s2-) ion becomes an atom after losing two electrons.

Indicates that the ion is -2 valence. Both x2-

A more appropriate answer is S2-, because S2- is free and O2- is not much in the free state.

When an atom gets an electron, it takes on a negative charge, which is called an anion; When an atom loses an electron, it becomes positively charged, called a cation.