Answer:
There are 110 elements known to us, out of which 92 are naturally occurring, while the rest have been prepared artificially. Elements are further classified into metals, non-metals, and metalloids..
Explanation:
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Answer:
True
Explanation:
Protons have a positive electrical of +1
Answer:
q_metal = -12000 J = -12 KJ
Here, the negative sign indicates that the energy is lost by the metal piece.
Explanation:
The magnitude of energy change of the metal X can be given by the following formula:
where,
m = mass of metal = 100 g
C = Specific Heat Capacity of metal X = 0.24 J/g.°C
ΔT = Change in Temperature of Metal Piece = 0° C - 500°C = -500°C
Therefore, using these values in the equation, we get:
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<u>q_metal = -12000 J = -12 KJ</u>
<u>Here, the negative sign indicates that the energy is lost by the metal piece.</u>
C. Can travel long distances through air
Answer=3
Electrons carry a negative charge while protons carry a positive charge