It’s [Xe]7s^2 5f^14 (first one) hopefully i could help!!
Answer:
other the effect of temperature on plants
Answer:
11 electrons
Explanation:
The atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).
I believe they are called Energy Levels or Energy Orbitals.
-2 for O
-1 for F
0 for N2
+1 for Li
+3 for Fe
