Match each element to the proper category. 1. germanium (#32) noble gas 2. magnesium (#12) halogen 3. thorium (#90) active metal 4. iodine (#53) transition metal 5. krypton (#36) metalloid 6. nickel (#28) actinoid series

Hi

Here are the most appropriate matches:

1) Germanium :  Metalloid.

Germanium or Ge is a metalloid that belongs to the group of carbon atom. It is hard, lustrous and greyish white in color.

2) Magnesium : Active metal.

Magnesium or Mg belongs to the group 2 . It has low electronegativity and ionization energy so it can lose two electrons that is why it is considered to be an active metal.

3) Thorium : Actinoid series.

Thorium or Th is considered to be a very radioactive metal with atomic number as 90 belonging to Actinoid series.

4) Iodine: Halogen.

Iodine exists in group 17 of periodic table that is a group of halogens or salt formers (Cl, F, Br, I, At and Ts). Iodine is a member of the group that is why most suited with it.

5) Krypton: Noble gas.

Krypton belongs to the group 18 of periodic table in which all noble gases exist like helium , argon, neon , krypton, radon (Rn) and xenon.

6) Nickel : Transition metal.

Nickel (Ni) is a very important that absorbs visible light when it is present in ionic form. This is because it is more reactive when its electrons are in d orbitals.

Hope it helps!

Explanation:

From the first law of thermodynamics

Q=ΔU+W

Q=heat supplies to the system

ΔU=change in internal energy of the system

W= work done by the gas  by the system

Q =12 KJ

ΔU==(mR/k-1)ΔT

ΔU=*(460-400)

     =14.924 KJ

Q=ΔU+W

W=-2.924 KJ

=+

=work done by the air

= P(V2-V1)

=mRT2-mRT1

=mR(T2-T1)=0.138*0.287*(460-300)=

                           =6.33 KJ

=+

                      =-2.924-6.33

=-9.26  KJ