University:
College
Course:
College Chemistry
Academic year:

2023
Views:

457

Pages:

3
Author:

C. Jenifer

Arrangement System Periodic Element Modern System periodic element modern Which called Also system periodic formlong, consisting of 7 periods and 8 groups. Periods 1, 2, and 3 are called short period because it contains few elements, while other periods called period long . Group divided on group A And group B. The elements of group A are called the main group , while group AB called group transition . Groups B located between groupIIA And IIIA. Group B start there is on period 4. In the latest periodic system of elements, groups are designated by group 1 until with group 18 in a way sequentially from left to right.With method This, so element transition located on group 3 until withgroup 12. Method like That can seen on system periodic element. Hydrogen placed in group HE, especially Because have1 valence electron. However, there are quite real differences in nature between hydrogen and other group IA elements. Hydrogen is classified nonmetal, whereas Which other is metal active. With reasonthe, hydrogen sometimes placed separated in part on system a. Period System periodic element modern have 7 period. ElementsWhich have amountskin Which The same on configuration the electrons,located on period Which The same. Amount Element Each Period inSystem Periodic Element Modern b. Group System periodic element modern have 8 group main (A). Elements in the modern periodic system that have electrons valence (electron skin outermost) The same on configuration the electrons,soThese elements are located in the same group (group main/A) The name Group on System Periodic Element Modern Group Main (A) Name Group Amount Electron Valence HE Alkali 1 IIA Alkali land 2 IIIA Boron 3 IVA Carbon 4 VA Nitrogen 5 VIA Oxygen 6 VIIA Halogen 7 VIIIA Gas glorious 8 1. Explain understanding group And period on system periodic element modern! 2. There is how many groups? main (A) and period on periodic system modern elements? 3. How connection configuration electron with system periodic element? 4. Determine configuration electron following This, Then mention his position ingroup And period on system periodic element modern! Element Configuration Electron Electron Valence Number Group Amount Skin Period K L m N O P 11 Na 12 Mg 17 Cl 18 Ar 20 Ca 32 Ge 35 Br 53 I 56 Ba 87 Fr 5. Name it elements Which including in: a. period 3 b. period 4 c. group alkali d. group alkali land e. group halogen 6. Is known element 13 Al, 16 S, 18 Ar, 34 Se, 37 K, 52 Te, 54 Xe, And 55 Cs. Determine elements Which located on group And period Which The same! 7. Ion X 2+ have amount electron 36. Determine position element X on groupAnd period system periodic element modern!