Science! What type of heat transfer takes place when a furnace heats up an entire room?

Radiation, because the element of the heater comes in contact with air in the room

Convection, because energy is carried by waves and not matter

Radiation, because heat travels in a cyclical manner

Convection, because air currents are formed

Copper, silver, aluminum, cobalt, chromium, mercury 

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na