When the Core of a Star Reaches a Temperature of About

Multiple Choice

When the core of a star reaches a temperature of about 100 million degrees (K) , something new happens in the core. What is this new event?

A) hydrogen nuclei begin to fuse into heavy hydrogen (deuterium) and then into helium
B) two helium nuclei begin fusing of beryllium (element number 4)
C) the core explodes
D) three helium nuclei begin fusing carbon (element number 6)
E) the fusion of iron (element 26)