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Date: 21-3-2017
1978
Date: 23-6-2019
1006
Date: 5-5-2019
1769
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Grouping atoms to form polyatomic ions
Ions can be polyatomic, composed of a group of atoms. For example, take a look at Table 5-3 in the preceding section. Notice anything about the mercury (I) ion? Its ion symbol,
Hg22+, shows that two mercury atoms are bonded together. This group has a 2+ charge, with each mercury cation having a 1+ charge. The mercurous ion is classified as a polyatomic ion. Similarly, the symbol for the sulfate ion, SO42–, indicates that one sulfur atom and four oxygen atoms are bonded together and that the whole polyatomic ion has two extra electrons: a 2– charge.
Polyatomic ions are treated the same as monoatomic ions (see “Naming ionic compounds,” later in this chapter). Table 5-4 lists some important polyatomic ions.
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"الرعاية التلطيفية".. تحسين جودة حياة المرضى هي السر
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العلماء الروس يطورون طريقة جديدة لإعادة تدوير النفايات البلاستيكية
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اختتام المراسم التأبينية التي أهدي ثوابها إلى أرواح شهداء المق*ا*و*مة
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