What element is in group 6, period 5:

Molybdenum is a Group 6 chemical element with the symbol Mo and atomic number 42.

Explanation:

for group 6 The main group consists of oxygen, sulphur, selenium, tellurium, and polonium.

and for group 5 The period 5 transition metals are yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), and cadmium (Cd).

Explanation:

answergravity;

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.