Biraha Kooxda 1 iyo 2

Cashar 3 / 4

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Muuqaalka casharka

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Bogagga casharka

Faahfaahinta casharka

Natiijada casharka

Waxaan qeexi karaa qaabka falcelinta biraha kooxda 1 ee biyaha iyo biraha kooxda 2 ee asiidhka khafiifka ah, oo waxaan isbarbardhigi karaa falcelinta labada koox.

Hordhac

Waxaan ku soo dhaweynayaa casharkan ku saabsan birta kooxda 1aad iyo 2aad, oo ka tirsan cutubka 'Patterns in the periodic table'. Kahor intaadan daawashadan bilaabin, waa inaad hore u taqaanid sida loo isticmaalo diiwaanka xilliyada (periodic table) iyo sida loo aqoonsado kooxaha (groups) iyo xilliyada (periods). Casharkani wuxuu ku barayaa sida ay birtaani u falceliso, isagoo ku lug leh tijaabo (experiment) xiiso leh.

Muuji qoraalka

The properties of elements in each group of the periodic table change gradually down the group. Group 1 metals are soft, have lower densities than most other metals, and become more reactive down the group. Group 1 metals are called alkali metals because they react with water to form an alkaline solution and hydrogen gas. Group 2 metals react with dilute acids to form a salt and hydrogen gas. Group 2 metals become more reactive down the group, but they are less reactive than Group 1 metals in the same period.

Warqadda shaqada

weli lama diyaarin

Imtixaannada

1. Waa maxay koox (group) ee jaantuska xilliyeedka (periodic table)?
- Saf elementyo ah oo leh tirada isku midka ah ee qolalka elektaroonka (electron shells).
- Jawaabta saxda ah:Tiir elementyo ah oo leh tirada isku midka ah ee elektaroonnada ku jira qolalka sare (outer shell).
- Saf elementyo ah oo loo habeeyay tirada atomiga (atomic number) ee sii kordhaysa.
- Tiir elementyo ah oo leh tirada isku midka ah ee borotoonnada (protons).
2. Kee ka mid ah weedhahan soo socda ayaa si sax ah u sharxaya falcelinta kiimikada (chemical reaction)?
- Curiyeyaasha waxaa loo habeeyaa iyadoo lagu salaynayo cufka atomiga.
- Jawaabta saxda ah:Walxuhu way is dhexgalaan si ay u sameeyaan wax soo saar cusub.
- Wax soo saar cusub lama sameeyo.
- Waxay ku lug leedahay isbeddello jireed oo keliya.
3. Xal pH-kiisu yahay 5 waa ...
- Jawaabta saxda ah:aashito (acidic).
- salaysan (basic).
- alkaline (alkaline).
- dhexdhexaad (neutral).
4. Mid ka mid ah weedhahan soo socda ayaa si sax ah u sharxaya asiidh (acid)?
- Jawaabta saxda ah:Waxay ka beddeshaa warqadda litmus ee buluuga ah midab cas.
- Waxay dareenka tahay mid simbiriirixan (slippery) marka la taabto.
- Waxay ka beddeshaa warqadda litmus ee casaan ah midab buluug.
- Waxay la falgashaa sal (base) si ay u samayso biyo iyo cusbo.

1. Waa kuwee qoraalada soo socda ee ku saabsan birta kooxda 1 (Group 1 metals) ay sax yihiin?
- Waa bir adag.
- Jawaabta saxda ah:Waxay leeyihiin cufnaan (density) ka hooseeya birta kale.
- Waxay noqdaan kuwa falgalka (reactive) badan marka hoos loo dhigo kooxda.
- Kuma falgalaan biyaha.
- Waxay sameeyaan xalalka aashito (acidic solutions) markay la falgalaan biyaha.
2. Run ama been? Soodhiyam, kaalshiyam iyo botashiyam waxay la falgalaan biyo ama aashito (acid) si ay u soo saaraan xal (solution) leh pH ka weyn 7.
- Jawaabta saxda ah:run
- been

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