Science, a system of knowledge.
Answer:
In a second hydrogen atom, an electron drops from level 2 to 1 .
The answer would be B, flapping ability.
D - block elements in a periodic table are also known as transition metals.
Answer:
<h2>0.4 moles</h2>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
We have the final answer as
<h3>0.4 moles</h3>
Hope this helps you