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Standard VII
Chemistry
Representation of Cell
Positive kern...
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Positive kernel and mobile electron
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Q.
Assertion :
Metals are good conductors of heat and electricity.
Reason:
The positive nuclei are surrounded by a "sea" of mobile electrons.
Q.
How many
electrons
are present in the kernel of Cl?
Q.
The mobile electron carrier of plastid electron transport system is ___________.
Q.
Assertion :In the formation of a molecule, only outer shell electrons of atoms take part in chemical combination, also known as valence electrons. Reason: Kernel of atom means positively charged nucleus.
Q.
Assertion :Metals conduct electricity. Reason: Electrons are free and mobile in metals.
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