What are the most important elements in the periodic table??

Atomic number Name Symbol Mass number (atomic weight, incomplete, may be misremembered) Chinese Pinyin (originally wanted to enter pinyin characters, but there is a bug in the paste bar The tone will display the error, I don't know if there will be one inside, for the sake of safety, use the number 1-4 to represent the flat sound - to the sound).

1 H1( qing1

2 Helium He 4 ( Hai4

3 Lithium Li 7 ( Li3

4 Beryllium be 9 (pi2

5 Boron b 11( peng2

6C12( Tan4

7 N 14 ( Dan4

8 Oxygen O16(Yang3

9 FluoroF19 ( FU2

10 Neon ne 20 ( Nai3

11 Sodium Na23 (Na4

12 mg 24 ( ME3

13 Al-27( Lv3

14 Si Si 28 Gui1

15P31 lin2

16 sulfur s 32 liu2

17 Cl 35 (approximate middle school range of the calculation formula is the only one with a decimal point; lv4

18 argon ar 40 ( ya4

19 potassium k39 (the first anomaly of non-positive correlation between atomic weight and atomic number in the periodic table) jia3

20 Ca, Ca, 40 Gai4

21 Scandium sc 45 Kang4

22 titanium ti 48 tai4

23 vanadium v 51 fan2

24 Cr 52 GE4

25 manganese mn 55 meng3

26 Fe 56 Tie3

27 Cobalt Co 59 GU3

28 Ni Ni 59 (approximate, second anomaly) NIE4

29 copper cu 64 tong2

30 zinc zn 65 xin1

31 gallium ga 70 jia1

32 germanium ge 73 zhe3

33 arsenic as 75 shen1

34 Se Se 79 XI1

35 Bromobr 80 xiu4

36 Krypton kr 84 ( ke4

Anyway, Mr. LZ is so boring.。。。 When I was in junior high school, I was required to memorize 20 (although I was actually bored enough to memorize the whole form and was not allowed to hand in the paper in advance, and I was not allowed to draw on scratch paper in the exam, 233--

Hawkers,Anyway, I remembered this purely because I was bored at the time.,Now I remember it.,I can't forget it.,Waste of brain capacity-,- in fact, there's really no need to remember atomic weights (unless you're specifically engaged in measuring atomic weights), and there should be all on the test paper (although it's not a big deal to remember a few.,Just don't remember it wrong anyway); As for the name of the element, the symbol and the atomic number, I am basically familiar with the chemistry major (I am not) (what my high school teacher said back then), there is no need to memorize it, that is, it should not be difficult to remember the top 20 in the junior high school range, but the content of elements 21-36 should be completely beyond the ......syllabus of junior high school except for iron, copper, and zinc

1. First cycle elements: 1 hydrogen (qīng) 2 helium (hài);

2. Second cycle elements: 3 lithium (lǐ) 4 beryllium (pí) 5 boron (péng) 6 carbon (tàn) 7 nitrogen (dàn) 8 oxygen (yǎng) 9 fluorine (fú) 10 neon (nǎi);

3. Third cycle elements: 11 sodium (nà) 12 magnesium (měi) 13 aluminum (lǚ) 14 silicon (guī) 15 phosphorus (lín) 16 sulfur (liú) 17 chlorine (lǜ) 18 argon (yà);

4. Fourth Cycle Elements: 19 Potassium (jiǎ) 20 Calcium (gài) 21 Scandium (kàng) 22 Titanium (tài) 23 Vanadium (fán) 24 Chromium (gè) 25 Manganese (měng) 26 Iron (tiě) 27 Cobalt (gǔ) 28 Nickel (niè) 29 Copper (tóng) 30 Zinc (xīn) 31 gallium (jiā) 32 Germanium (zhě) 33 Arsenic (shēn).

The periodic table has 7 periods and 16 families. Each horizontal row is called a cycle, and each vertical row is called a family (group VIII contains three columns). These 7 cycles can be divided into short cycles and long cycles).

There are 16 families, one in each column from left to right (except for VIII).

The question of how many chemical elements there are is is still no conclusion, because the elements are still being discovered and manufactured.

At present, there are a total of 119 species, 1h hydrogen.

2HE helium. 3li lithium.

4be beryllium. 5b boron 6c carbon.

7N nitrogen 8o oxygen.

9F fluorine 10ne neon.

11na sodium.

12 mg magnesium.

13al aluminum.

14si silicon.

15p phosphorus. 16s sulfur.

17cl chlorine.

18AR argon.

19k potassium. 20Ca Calcium.

The periodic table has 118 elements. First cycle: 2, second cycle:

8, 3rd Cycle: 8, 4th Cycle: 18, 5th Cycle:

18, 6th cycle: 32, 7th cycle: 32.

The periodic table has 118 elements. Periodic table of chemical elements.

is a list of chemical elements sorted from smallest to largest according to their atomic number. The list is generally rectangular in shape, with spaces in the period of some elements, so that elements with similar characteristics are grouped into the same family, such as alkali metal elements, alkaline earth metals, and halogen group elements.

Noble gases, etc.

Chemical elements return to the groupThe question of how high the leakage is still inconclusive, as the elements are still being discovered and manufactured.

At present, there are a total of 119 species, 1h hydrogen.

2HE helium. 3li lithium or quietly.

4be beryllium. 5b boron 6c carbon.

7N nitrogen 8o oxygen.

9F fluorine 10ne neon.

11na sodium.

12 mg magnesium.

13al aluminum.

14si silicon.

15p phosphorus. 16s sulfur.

17cl chlorine.

18AR argon.

19k potassium. 20Ca Calcium.

26 chemical elements: H (hydrogen), HE (helium), LI (lithium), BE (beryllium), B (boron). C (carbon), N (nitrogen), O (oxygen), F (fluorine), Ne (neon).

Na (sodium), mg (magnesium), Al (aluminum), Si (silicon), P (phosphorus differential ridge). S (sulfur), Cl (chlorine), AR (argon), K (potassium), Ca (calcium).

So far in 2019, a total of 118 elements have been discovered, 94 of which are found on Earth. The nuclei of the elements with atomic number 83 (bismuth element and later) are unstable and decay. The 43rd and 61st elements (technetium and promethium) have no stable isotopes and decay.

The heaviest surviving element in nature is neptunium 93.

The periodic table has 7 periods and 17 families.

Each horizontal row is called a cycle, and each vertical row is called a family. These 7 cycles can be divided into short cycles and long cycles). There are 17 families, namely:

Alkali metals, alkaline earth metals, rare earth metals, titanium group elements, vanadium group elements, chromium group elements, manganese group elements, iron group metals, platinum group metals, currency metals, zinc group elements, boron group elements, carbon group elements, phosphorus elements, chalcogenides, halide elements, rare gas elements. The position of an element in the periodic table not only reflects the atomic structure of the element, but also shows the law of gradual change in the properties of the elements and the internal connections between the elements.

It is uncertain that humans have synthesized 119 at the moment. There may still be. Now the elements synthesized by human power do not exist in nature, because the atoms are unstable and can easily decay. You don't have to remember so much, just remember radium.

At present, there are only 112 species, but many unknown elements exist, including the last non-metallic element, a part of the naturally occurring radioactive element, etc. These elements are found in very small quantities in nature, or even only exist in the universe, waiting to be synthesized. The origin of the formation of the element is hydrogen, and it took tens of thousands of years of fusion fission to form the current number of elements.

At the beginning of the formation of the earth, there was a single type of element, and now there are so many elements, all of which are the forces of nature. The unknown element should not have appeared, but may have disappeared. So, there are currently 112 elements that make up the current periodic table.

Pure hand hitting, the owner of the watchtower adopts, give a high score, thank you.

According to the existing theory of the loss of the palace, the reply is as follows:

First cycle: 2 pcs.

Second cycle: 8.

Third cycle: 8.

Fourth cycle: 18.

Fifth cycle: 18.

Sixth cycle: 32.

Seventh cycle: 32 (not fully discovered).

Generally speaking, to the seventh cycle hall Zheng behind is basically artificial elements, artificial elements are extremely unstable and require a lot of energy, so the periodic table of elements should be at the end of the seventh cycle, a total of 118 elements to calm the gods).