Advertisements
Advertisements
प्रश्न
Differentiate between the following term:
Atomic number and mass number
Advertisements
उत्तर
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
संबंधित प्रश्न
Dalton said that ______ could not be divided.
What are the two main features of Rutherford’s atomic model?
Fill in the blanks- The number of protons in the nucleus of an atom is called its ....................
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
The atomic number of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is :
Define the term ‘atomic number’ of an atom.
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Carbon – \[\ce{^12_6C}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
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]
When an atom gives electrons from its outermost shell, it becomes ______ charged.
