Monovalent lithium hydrogen, potassium sodium silver, divalent calcium oxygen, barium magnesium zinc.
Tri-aluminum-silicon pentavalent phosphorus and valence-changing elements.
One, two, copper, mercury, one, two, silver, one, three, gold and one, five, bromine and iodine.
Tetrahelium, pentanitrogen, sulfur hexaoxide, iron and carbon.
246 sulfur, 35 nitrogen and 157 chlorine are common.
The valence of elements is zero. Negative hydroxyl mononitrate, negative carbonic acid disulfate.
Remember that phosphate is minus three and ammonium is plus one.
Shorthand skills of element symbols;
1, associative memory method: connect the symbols of each element in series through association to form a vivid and interesting sentence or story, which is easy to remember. For example, the symbols of the first 20 elements can be connected in series to form a story: Dear Li Pippen, be frank and be happy. That beautiful woman, Guilin, revealed that she was married. Anti-Taiwan counter-revolution has provided new problems.
Fake people are happy and ashamed, but they can do whatever they want. Through this story, you can easily remember the order and names of the first 20 element symbols. You can also use auxiliary tools such as cards to write information such as element symbols, corresponding names, atomic numbers, etc. on the cards, which is convenient for reading and remembering at any time.
2, rhyme memory method: the element symbols into rhyme or jingle, through rhythm and rhythm to help remember. Such as hydrogen, helium, lithium, beryllium and boron, carbon, nitrogen, oxygen, neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon, potassium and calcium. This jingle can help you remember the order and names of the first 20 element symbols.
You can also try to write your own rhymes or jingles, linking the symbols of elements with corresponding properties or characteristics, such as metallic elements shining and nonmetallic elements sinking secretly. This can help to remember the symbols and properties of elements.
3. Classified memory method: classify the element symbols according to certain rules, and then memorize them separately. For example, metallic elements and nonmetallic elements can be memorized separately, or elements of the same family can be memorized separately. By classified memory method, we can remember element symbols more systematically and methodically.
You can also try to associate the symbol of the element with the corresponding compound or reaction, for example, calcium oxide becomes calcium hydroxide when it meets water. This helps to remember element symbols and chemical reactions.