Something that’s strange or doesn’t happen often
in a sentence “ in all his travels he studied only the phenomena of nature and life
Answer:
four 0.5 times 10 to the 23rd Adams of Neptune
Explanation:
Explanation: energy levels are three(counting number of cyecles) outer electrons are 3 also
Answer:3,3
Answer:
Monatomic molecule
Explanation:
Each helium atom has 2 electrons, which is already the maximum no. of electrons that can fit in the first electron shell. When the outermost electron shell is full (2 for the first layer, 8 for others), the atom is stable.
Helium atom itself is already stable, so it doesn't need to combine with another helium atom to form a molecule, hence we call it monatomic.
