In medium-sized stars such as the Sun, nuclear fusion almost always means the fusing of (1) nuclei to form (2), but larger stars can produce elements as heavy as (3). 1.
Helium
Hydrogen
Nitrogen

2.
Hydrogen
Lithium
Helium

3.
Copper
Silver
Iron

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

Which layer will become saturated first when rain falls?

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?