Answer:
21 neutrons
Explanation:
There are 21 neutrons in Pottasium-40
All mixtures contain only one kind of atom.
~Mschmindy
La energía térmica es la energía que proviene del calor.
De nada ;)
First, the symbol for sodium oxide is Na₂O
Each Na (sodium) has a charge of 1+, and each O has a charge of 2- :
Na₂¹⁺O²⁻
There are two Na's, however, and each one is 1+, however, so the Na₂ has a total charge of 2+. Because of this, the 2+ from the 2 Na's and the 2- from the O cancel each other out to make 0.
An electric current can be carried through a metal by the free flow of the shared electrons.
