Formula of periodic table of chemical elements
The first cycle: hydrogen helium → invasion.
The second cycle: lithium, beryllium, boron, carbon, nitrogen, oxygen and neon → carp skin holding carbon, eggs raising milk.
The third cycle: Na-Mg-Al-Si-P-S-Cl-Ar → that beauty Guilin tooth green (a little scary).
Iron, cobalt, nickel, copper, zinc, gallium, germanium → iron, menstruation, pinch, pain, new bride
Arsenic selenium bromine krypton → gas shock
The fifth cycle: rubidium strontium yttrium zirconium niobium → so tell you.
Molybdenum, technetium and ruthenium → Great.
Rhodium, Palladium, Silver, Cadmium, Indium, Tin and Antimony → Laoba Silver, Yin Ge and Xidi.
Xenon-iodine telluride → a little salty.
The sixth cycle: cesium, barium, lanthanum and hafnium → colored shell blue river
Tantalum, tungsten, rhenium, osmium → But a crow leads a goose.
Iridium, platinum, mercury, lead → white towel for it.
Bismuth, polonium and radon → Never love winter.
The seventh cycle: rubidium, radium, actinium → lightning protection!
The memory method of the periodic table of chemical elements is as follows:
1. Break the whole into parts and disperse memory: start with common element symbols, adopt the strategy of breaking the whole into parts, classify and consciously remember from different angles;
2. Easy-to-mix symbols, comparative memory: for the element symbols composed of two letters with the same initial letter, list them separately, and use comparison to strengthen memory;
3. Make up poems and recite rhymes;
4, the most element, inductive memory.