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Which of the following statements about elements is true?
- a)They consist of only one type of atom.
- b)They are always found in compounds.
- c)They have variable compositions.
- d)They can be broken down into simpler substances.
Correct answer is option 'A'. Can you explain this answer?
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Which of the following statements about elements is true?a) They consi...
Understanding Elements
Elements are fundamental substances in chemistry that cannot be broken down into simpler substances by chemical means. Let's explore why the statement "They consist of only one type of atom" is true.
Definition of Elements
- Elements are pure substances made up of only one kind of atom.
- Each element is defined by the number of protons in its nucleus, known as the atomic number.
Why Other Options Are Incorrect
- Option B: They are always found in compounds.
- This is false because elements can exist independently, such as oxygen (O2) or gold (Au), without forming compounds.
- Option C: They have variable compositions.
- This statement is incorrect as elements have a fixed composition. For instance, all atoms of carbon (C) are identical.
- Option D: They can be broken down into simpler substances.
- This is not true. Elements are the simplest forms of matter and cannot be broken down chemically.
Conclusion
The correct statement about elements is that they consist of only one type of atom. This uniqueness makes them the building blocks of all matter, forming the basis for compounds and mixtures. Understanding this fundamental concept is crucial in the study of chemistry.
Elements are fundamental substances in chemistry that cannot be broken down into simpler substances by chemical means. Let's explore why the statement "They consist of only one type of atom" is true.
Definition of Elements
- Elements are pure substances made up of only one kind of atom.
- Each element is defined by the number of protons in its nucleus, known as the atomic number.
Why Other Options Are Incorrect
- Option B: They are always found in compounds.
- This is false because elements can exist independently, such as oxygen (O2) or gold (Au), without forming compounds.
- Option C: They have variable compositions.
- This statement is incorrect as elements have a fixed composition. For instance, all atoms of carbon (C) are identical.
- Option D: They can be broken down into simpler substances.
- This is not true. Elements are the simplest forms of matter and cannot be broken down chemically.
Conclusion
The correct statement about elements is that they consist of only one type of atom. This uniqueness makes them the building blocks of all matter, forming the basis for compounds and mixtures. Understanding this fundamental concept is crucial in the study of chemistry.
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Which of the following statements about elements is true?a) They consi...
Elements consist of only one type of atom and cannot be broken down into simpler substances by chemical means. Each element has unique properties and is represented on the periodic table.
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