Advertisements
Advertisements
Question
Differentiate between the following term:
Atomic number and mass number
Solution
Differentiate between:
Atomic number:
- Z is the number of protons or the number of electrons in an atom.
- Present in nucleus = P
Present in orbits = e
Mass number:
- A is the sum of protons and neutrons.
- Present in the nucleus of an atom.
APPEARS IN
RELATED QUESTIONS
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
FILL IN THE BLANK
Atomic theory of matter was given by ..........................
The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
Draw the orbital diagram of `""_20^40"Ca"^(2+)` ion and state the number of three fundamental particles present in it.
Name or state the following:
Elements having same mass number but different atomic number
What are orbits or shells of an atom?
Elements A, B and C have atomic numbers 9, 20 and 10 respectively.
- State which one is
(1) a non-metal,
(2) a metal,
(3) chemically inert.[A,B,C] - Write down the formula of the compound formed by two of the above elements.[BA2]
The atomic number and the mass number of an element is 26 and 56 respectively. Calculate the number of electrons, protons and neutrons in its atom. Draw the structure.
Mass No. 27 is for the element ______.
What is the relation between mass number & atomic number?
