Physics
Grade-9
Easy
Question
What are the particles of the system (red-hot iron rod) shown below?
- Iron molecules
- Iron atoms
- Copper atoms
- Brass atoms
Hint:
Iron bar contain Fe atom.
The correct answer is: Iron atoms
The iron atom, which is given the symbol Fe, has an atomic weight of 56.The iron atom, which is given the symbol Fe, has an atomic weight of 56 which compares with aluminium, Al, at 27, lead, Pb, at 207 and carbon, C, at 12. In iron at room temperature the atoms are arranged in a regular pattern, or lattice, which is called body centred cubic or bcc for short.
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