White gold is made out of yellow gold mixed with other metals, which are added to make the alloy harder and whiter.
Even when mixed with whiter metals, white gold still retains a yellowish hue.
The quality characteristic most often used to evaluate white gold is its karat.
He was involved in the mapping of venus and mars
<span>Hydrogen fusion generates the energy for proton - proton chains and the carbon nitrogen oxygen cycle. It is the nuclear fusion of 4 protons to form a helium 4 nucleus.</span>
Answer:
ionic bond
Explanation:
calcium is a metal and oxygen is a nonmetal. Ionic bonds occur between a metal and a nonmetal while covalent bonds occur between two nonmetals.