5. (a) What are poly-atomic ions? Give two examples. (b) Name and state the fundamental law that every equation must fulfill.
Answers
a) polyatomic elements can be regarded as those ions in which more than two atoms are present with either positive or negative charge. Some examples are: NO−3, this is nitrate ion and it is regarded as a polyatomic ion because there is one nitrogen and three oxygen atoms and it has a negative charge.
b) Fundamental law involved in every equation is "the law of conservation of mass".
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Answer:
a)A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit. The prefix poly means "many," in Greek, but even ions of two atoms are commonly referred to as polyatomic.
Examples: Carbonate (CO3²¹), sulphate (SO42-), nitrate - NO3 and hydroxide ions OH are all polyatomic ions.
b) Fundamental law involved in every equation is "the law of conservation of mass".
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