Advertisements
Advertisements
Question
Define the term Mass number.
Advertisements
Solution
Mass number refers to the sum of the number of protons and neutrons present in the nucleus of an atom and denoted by A Mass number = Number of protons + Number of neutrons.
APPEARS IN
RELATED QUESTIONS
Fill in the blank
The outermost shell of an atom is known as............................
Multiple Choice Questions
number of valence electrons present in magnesium is
Mention briefly the salient features of Dalton’s atomic theory (five points)
Tick the most appropriate answer
β-particles are actually a stream of
- protons
- electrons
- neutrons
- none of these
WRITE SHORT ANSWER
What is an atom?
WRITE SHORT ANSWER
Describe a discharge tube.
Name the negatively charged particle present in the atoms of all the elements.
Compare an electron and a proton in respect of mass and charge.
State the location of electrons, protons and neutrons in an atom.
What is meant by the term subatomic particles?
