SHORT-ANSWER QUESTIONS: Answer in a sentence or
1. When will two elements on being mixed together forma compound?
2. Why are the properties of different compounds so different from each other
3. Why are most elements not found in the free stare in nature?
4. How can you form iron sulphide from a mixture of iron and clipshur?
5. What does a formula represent?
6. Define valency in terms of hydrogen
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Answers
Answer:
1.When two elements are mixed together, a compound is only formed when they react with each other. If they donot react, no compound is formed.
2.Compounds have different properties from the elements that make them. The atoms of different elements are held together in compounds by chemical bonds. ... Bonds help determine the properties of a compound.
3.The most elements are not found in free state because elements have a ability to combine with substances
4.Iron sulphide can be formed by heating a mixture of iron and sulphur. It becomes a hard black sloid and does not represent the individual properties of iron and sulphur individually.
5.A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element. In empirical formulae, these proportions begin with a key element and then assign numbers of atoms of the other elements in the compound, by ratios to the key element.
6.Valency can be defined as the same number of hydrogen atoms or double the number of oxygen atoms that element combines with.
Explanation:
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