The correct answer is (c) The two oxygen atoms are isotopes. Isotopes of an element have the same number of electrons and protons but different numbers of neutrons. In ethyl ethanoate (CH₃COOC₂H₅), both oxygen atoms belong to the same element ...
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Non-metals like fluorine (F), chlorine (Cl), and bromine (Br), which gain one electron to form negative ions (anions). Thus, elements with valency 1 are not always metals or non-metals but can be either. Class 9th Science NCERT MCQ Questions NCERT ...
The correct answer is: (c) either metals or non-metals. Elements with valency 1 can be: Metals like sodium (Na), potassium (K), and lithium (Li), which lose one electron to form positive ions (cations). Class 9th Science NCERT MCQ Questions NCERT ...
The probability of an event is a measure of the likelihood that the event will occur. It is calculated as the ratio of favorable outcomes to total possible outcomes. Probability values range from 0 (impossible event) to 1 (certain event). ...
P(A) = 4/5 and P(A ∩ B) = 7/10, this means the probability of event A occurring is 4/5, and the probability of both events A and B occurring together is 7/10. To find P(B), use the formula P(A ∩ ...