① write chemical formula of all compounds that can be formed by combination of ions Ca2+ , K+ , Fe3+ ,a+ ,SO4 2--
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Answer:
calcium, pottasium,iron, sulphur oxide
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Explanation:
For,
Ca2+ - Calcium - Ca
K+ - K
Fe3+ - Fe - iron
a+ - al - alumminum
SO4²- - sulphur
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