copper and nickel.
You think to an alloy.
You think probable to alkali earth metals.
This coin was minted in two metals. Standard cupronickel clad proofs are worth only a couple of dollars. As of 80/2014 40% silver proofs retail for $9 to $23 depending on their quality.
No, Singapore coins are made of non-magnetic metals such as cupronickel or copper-clad steel, so they are not attracted to a magnet.
Monel metal is a cupronickel alloy. It's a trademark of the Special Metals corporation, and there are actually several different varieties with slightly different compositions and properties.
A cupronickel coin is a coin that is made of an alloy of copper and nickel. Current US dimes, quarters and half dollars have an outer cladding of cupronickel, while 5-cent pieces are solid cupronickel. Many British and Australian coins are also struck in cupronickel. A blend of 75% copper/25% nickel is frequently used for coins because its color resembles silver while the high copper content allows it to be easily struck in coin presses. Other percentages are sometimes used; for example British 20p coins are made in an 84/16 ratio of copper to nickel.
A quarter is actually made up of two elements, nickel and copper. This is not a compound, it is a mixture (mixtures of metals are called alloys).
Two Metals, that are different
No, cupronickel is not a magnetic material. It is a non-magnetic alloy composed of copper and nickel, making it resistant to magnetic fields.
The two patterns include metals and non-metals. metals are placed on left and non-metals on right side.
I think the bonding is covalent as it is between two non-metals
the alkaline earth metals