Advertisements
Advertisements
Question
Give reason
Actual atomic mass is greater than mass number.
Advertisements
Solution
Actual atomic mass is greater than the mass number because the mass number is a whole number approximation of atomic mass unit. In fact, neutrons are slightly heavier than protons, and an atom has over 200 sub-atomic particles.
APPEARS IN
RELATED QUESTIONS
Fill in the blank of the following statement :
All the mass of an atom is concentrated in a small region of space called the ___________.
The properties of the elements are a periodic function of their __________.
State the main postulates of Dalton’s atomic theory.
State why the atomic weight of an element is also termed relative atomic mass.
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Carbon [At. no. = 6, Mass no. = 12]
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Sodium [At. no. = 11, Mass no. = 23]
Atomic number : ______ :: Mass number : Number of protons and neutrons.
What are nucleons? How many nucleons are present in Phosphorous? Draw its structure.
Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number.
Electrons revolve around the nucleus in definite open shells.
