30 chemical elements jingle.

1, Dangdang: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon, potassium and calcium.

2. Memory formula: Dear Li, be honest with each other and improve happiness. (Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, fluorine, neon) That beautiful woman Guilin, beef should be added with calcium. (sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon, potassium and calcium).

3, chemical reaction: I am hydrogen, I am the lightest, rockets rely on me to transport satellites. I'm helium, I'm a rogue, and I'm not good at gaining and losing electrons. I'm lithium, with low density, and it bubbles when it meets water and acid. I am beryllium, cheating, although metal is difficult to ionize.

Extended data

Chemical elements have the same nuclear charge number (i.e. the number of protons in the nucleus). From the philosophical point of view, it is the result of qualitative change caused by the quantitative change of the number of electrons in the atom.

There are 100 kinds of basic metals and nonmetallic substances in nature, which are composed of only one atom. Each nucleus in an atom has the same number of protons, which cannot be decomposed by general chemical methods and can constitute all substances. Examples of some common elements are hydrogen, nitrogen and carbon. By 20 12 years, a total of 1 18 elements were discovered, 94 of which were found on the earth.

Baidu encyclopedia-chemical elements