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A) Identify the parts labeled A, B and C. b) State the electronic configuration of an atom with 17 electrons. c) Distinguish between an atom and an ion. 2. Calculate the molar mass of the following compounds: a) CaCO3 (Ca = 40, C = 12, O = 16)

Chemistry

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2 parts
b

2.8.7\text{2.8.7}

c

100 g/mol\text{100 g/mol}

Step-by-step solution

2 steps

Hapa kuna masuluhisho ya maswali yako:

1. a) Tambua sehemu zilizoandikwa A, B na C.

  • A: Kiini (Nucleus)
  • B: Elektroni (Electron)
  • C: Ganda la elektroni / Kiwango cha nishati (Electron shell / Energy level)

Part b

Eleza mpangilio wa kielektroni wa atomu yenye elektroni 17.

Mpangilio wa kielektroni wa atomu yenye elektroni 17 ni:

  • Ganda la kwanza (K): 2 elektroni
  • Ganda la pili (L): 8 elektroni
  • Ganda la tatu (M): 7 elektroni Mpangilio ni 2.8.7\boxed{\text{2.8.7}}.

Part c

100 g/mol\text{100 g/mol}

Tofautisha kati ya atomu na ioni.

  • Atomu ni chembe ndogo zaidi ya elementi ambayo haina chaji ya umeme (haina chaji chanya wala hasi). Ina idadi sawa ya protoni na elektroni.
  • Ioni ni atomu au kundi la atomu ambazo zimepoteza au kupata elektroni moja au zaidi, na hivyo kuwa na chaji ya umeme (chanya au hasi).

2. a) Kokotoa masi ya mola ya kiwanja kifuatacho: CaCO3_3 (Ca = 40, C = 12, O = 16)

  1. Andika masi ya atomiki ya kila elementi na idadi ya atomu zake katika kiwanja.

    • Kalsiamu (Ca): 1×40=401 \times 40 = 40
    • Kaboni (C): 1×12=121 \times 12 = 12
    • Oksijeni (O): 3×16=483 \times 16 = 48

  2. Jumlisha masi za atomiki zote ili kupata masi ya mola.

    Masi ya mola ya CaCO3=40+12+48=100\text{Masi ya mola ya CaCO}_3 = 40 + 12 + 48 = 100

    Masi ya mola ya CaCO3_3 ni 100 g/mol\boxed{\text{100 g/mol}}.

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