Answer:
chlorine and I think maybe sulphur. but check the internet
Sound waves are waves of growing larger and smaller, making it seem elastic through substances, such as air.
Answer: The specific heat of the unknown metal is 
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=
Joules
m= mass of substance = 86.8 g
c = specific heat capacity = ?
Initial temperature of the water =
Final temperature of the water =
Change in temperature ,
Putting in the values, we get:


The specific heat of the unknown metal is 
C. Lowering the temperature
At the lower temperature, particles have less kinetic energy, so they move slower.