Advertisements
Advertisements
प्रश्न
Write true or false for the following statement
The central pad of the atom is called nucleus.
विकल्प
True
False
Advertisements
उत्तर
True
APPEARS IN
संबंधित प्रश्न
Give the following a suitable word/phrase
The sub-atomic particle with negative charge and negligible mass.
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
Tick the most appropriate answer.
Which of the following scientists observed that cathode rays consists of negatively charged particles?
- John Dalton
- J J Thomson
- James Chadwick
- Democritus
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
WRITE SHORT ANSWER
What is an atom?
WRITE SHORT ANSWER
What is the charge on a neutron ?
Draw the electronic configuration of the following elements clearly stating the number of neutrons and protons in their nucleus.
a. Beryllium b. Silicon
c. Chlorine d. Aluminium
e. Nitrogen
Why is an atom neutral inspite of the presence of charged particles in it?
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
