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Question
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
Options
mass number
atomic number
number of electrons
all of the above
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Solution
mass number
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RELATED QUESTIONS
The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement?
Give reason
Actual atomic mass is greater than mass number.
An element A atomic number 7 mass numbers 14
B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
State Valency of each element
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B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
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Oxygen – \[\ce{^16_8O}\]
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The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
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What are nucleons? How many nucleons are present in Phosphorous? Draw its structure.
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