I m going to do a junior high school chemistry hand copied newspaper, I need chemistry information,

1. Chemical change: changes in other substances are generated.

2. Physical change is only rapid: there is no change in the formation of other substances.

3. Physical properties: properties that do not need to undergo chemical changes to manifest themselves.

Such as: color, state, density, odor, melting point, boiling point, hardness, water solubility, etc.) 4. Chemical properties.

The properties of matter that manifest themselves in chemical changes.

Such as: flammability, flammability, oxidation.

reducibility, acidity and alkalinity, stability, etc.).

5. Pure substance.

Consists of one substance.

6. Mixture: It is composed of two or more pure substances, and each substance retains its original properties. Bury Wang.

7. Element: with the same number of nuclear charges.

i.e. proton number).

8. Atom: It is the smallest particle in the chemical change of the liquid and cannot be divided in the chemical change.

9. Molecule: It is the smallest particle that maintains the chemical properties of a substance, and can be redivided in chemical changes.

10. Elemental: a pure substance composed of the same element.

To say that the closest and most inseparable "chemical" to human beings in daily life is carbon dioxide, which is inseparable from human life, and at the same time plays a significant role in human production and life.

Carbon dioxide, the most common molecule for us, is one of the components of air, it cannot be burned, the density is slightly greater than air, slightly soluble in water, carbonated drinks in daily life are prepared by dissolving carbon dioxide in water under high pressure conditions.

For ordinary people in their daily activities, about 1 liter of carbon dioxide can be produced every minute through breathing alone, and carbon dioxide is produced by the respiration of animals and plants, the burning of fossil fuels, all industrial production, urban operations, and transportation. The photosynthesis of plants plays an important role in the consumption of carbon dioxide. According to an article published in the journal Science by the Institute of Geochemistry in Jena, Germany, Bill, the world's plants absorb 123 billion tons of carbon dioxide every year, which is an astronomical figure that should not be underestimated.

1.You are hydrofluoric acid and I am silica. I would like to dissolve into your blood and bones, just as silica dissolves in hydrofluoric acid at room temperature, and that's it.

2.Helium, I am the element from the sun, and you are my sunshine, lighting up my bleak soul.

3.Chemistry is ever-changing, and experiments follow the rules to explore;

4.To love science is to love the truth, and therefore, honesty is the main virtue of a scientist. — Feuerbach.

5.Phosphorus, your little bit of heat and hunger can make me burn for you with joy.

6.I am the n in the ammonium ion, you are the proton in the ammonium ion, the empty orbit in my heart, which is reserved for you by Yongtang.

7.Use your hands and brains, be studious and thoughtful;