Answer:
It is present in the second group of the periodic table
Explanation:
Answer:four hydrogen atoms
Explanation:
Answer: 1.67 kg
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q = Heat absorbed=
=
(1kJ=1000J)
m= mass of substance = ?
c = specific heat capacity = 
Change in temperature ,
Putting in the values, we get:

(1kg=1000g)
Thus the mass (in kg) of the copper sample is 1.67
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How an atom reacts chemically depends on how willing it is to share electrons with others.
It’s electrons