28.0 x 0.6424 = 18
25.0 x .6424 = 16.1
Mass = 34.1
A Neutralisation reaction, the alkali is neutralizing the acid.
Answer:
The Group 7A elements have seven valence electrons in their highest-energy orbitals (ns2np5). This is one electron away from having a full octet of eight electrons, so these elements tend to form anions having -1 charges, known as halides: fluoride, F-; chloride, Cl-, bromide, Br-, and iodide, I-.
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Group 7A — The Halogens.
(7)
(8)
(9)
(10)
Explanation:
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Answer:
answer: D
Explanation:
according to the aufbau principle the electrons should be filled
