The element of an electric stove is made of nichrome. Nichrome is a nickel-chromium alloy that is used in heating elements because it has a high resistance to heat and electricity. It is also non-magnetic, which makes it ideal for use in electric stoves.
Invar is an alloy of iron and nickel that is used in applications where a high degree of stability is required. It has a very low coefficient of thermal expansion, which means that it does not change size much when it is heated or cooled. This makes it ideal for use in things like watches and other precision instruments.
Copper is a good conductor of heat and electricity, but it is not as resistant to heat as nichrome. This means that it would not be a good choice for use in the element of an electric stove.
Magnalium is an alloy of magnesium and aluminum. It is a lightweight metal that is strong and corrosion-resistant. However, it is not as resistant to heat as nichrome, and it is also not a good conductor of electricity. This means that it would not be a good choice for use in the element of an electric stove.