All of the universe’s original supply of hydrogen came from . the Big Bang
a parallel universe
the space-time continuum
black holes

Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.

Draw metallic bonding if two copper

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive