Answer:
The first energy level is closest to the nucleus. The second energy level is a little farther away than the first. ... The electrons in the energy level farthest from the nucleus are called valence electrons. Atoms in the same column (group) in the periodic table have the same number of valence electrons.
Explanation:
Answer:
20.4081633 or 20.408
Explanation:
These ones you can do the regular method but it takes to long just divide and shoot.Hope this helps.
