Which of the following changes is observed when we move across the row from left to right in the periodic table?

Metallic character decreases as you move across a period in the periodic table from left to right. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell.

0.57J/g°C is the specific heat  capacity of the metal.

Explanation:

Heat lost by metal will be equal to heat gained by the water

Mass of metal=

Specific heat capacity of metal=

Initial temperature of the metal=

Final temperature =

Mass of water=

Specific heat capacity of water=

Initial temperature of the water =

Final temperature of water =

On substituting all values:

we get,

0.57J/g°C is the specific heat  capacity of the metal.