Question

at these high temperatures, neon
______ into oxygen.
in stars at least ______ times more massive
than the sun, oxygen nuclei fuse into silicon.
silicon nuclei fuse with helium nuclei repeatedly until
______ is formed - then the star explodes
in a

Explanation:

Step1: Neon burning

Neon burning is a nuclear fusion process in stars. At high temperatures, neon nuclei fuse.
$$\text{Ne} \text{ burning}$$

Step2: Massive stars

Stars at least 8 times more massive than the Sun can have oxygen nuclei fuse into silicon.
$$8$$

Step3: Silicon burning

Silicon nuclei fuse with helium nuclei repeatedly until iron is formed.
$$\text{Fe (iron)}$$

Answer:

Neon burns; 8; iron