Specific heat of common metals (J/g°C)
iron lead magnesium silver
0.449 0.128 1.024 0.233
aluminum
0.900
zinc
0.387
a) A piece of unknown metal with a mass of 92.9 g is heated with 1.28 kJ of energy.
The metal is solid throughout the experiment and the temperature changes from to
22.0°C to 81.1°C. What is the specific heat of the metal?
Answer here J/g°C
b) Which of the following choices could be the identity of the unknown metal?

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

b.

the accuracy of the data.