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प्रश्न
Multiple Choice Questions
number of valence electrons present in magnesium is
पर्याय
two
three
four
five
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उत्तर
two
APPEARS IN
संबंधित प्रश्न
Give the following a suitable word/phrase
The sub-atomic particle with negative charge and negligible mass.
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
What are the two main parts of which an atom is made of?
FILL IN THE BLANK
In an atom, the last shell containing electrons is called its..................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
ANSWER IN DETAIL
Name the three subatomic particles. How are they different from each other ?
State the location of electrons, protons and neutrons in an atom.
Explain in brief – Goldstein’s experiment which led to the discovery of the proton.
Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.
`""_1"H"^1`, `""_0"n"^1`,`""_(-1)"e"^0`
