Consider the following statements:
I: The radius of an anion is larger than that of the parent atom.
II: The electronegativity of any given element is a constant, and it is a measurable quantity.
III: The electronegativity of an element is the tendency of an isolated atom to attract an electron. 
Which of the above statements is/are correct?
1. Only I 
2. Only II 
3. Only I and III 
4. Only II and III
Subtopic:  Electronegativity |
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Mark the correct arrangement of the elements B, C, At, and S in order of increasing electronegativity:

1. B > C > S > At
2. S > C > B > At
3. C > B > S > At
4. S > C > At > B
Subtopic:  Electronegativity |
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