Question

Match the events related to the formation of the universe with the stages in which they occurred

Answer 1

Answer : The chronological order events related to the formation of the universe with the stages in which they occurred are given below;

1. Expansion from an infinitely hot point  - Which is also called as the Planck era from which the big bang theory arrived. It is assumed that from the moment of initial expansion to $10^{-43}$ seconds afterwards, and many also refer that it was from an infinitely hot point.
2. Hydrogen fuses into helium  - This was called as the era of Nucleosynthesis which resulted from the Fusion and it continued in the Era of Nucleosynthesis ( which is 0.001 seconds – 3 minutes)
3. The first neutral atom begins to form - Era of atoms, it began in around 380,000 years – 1 billion years or so.

For better understanding please refer the attachment.