The right option is; a pure substance and an element.
A piece of sodium metal can be described as a pure substance and an element.
Sodium is a chemical element with an atomic number of 11. Sodium is a soft, waxy, silvery, highly reactive metal. Sodium belongs to group 1 of the periodic table and it is highly abundant in the earth’s crust. Sodium can also be found in various minerals such as rock salt, feldspars and sodalite.
Answer:
true
Explanation:
because Lewis represent valid resonance
One mole of Ba: 137.33 grams
.5 * 137.33 = 68.67
Answer:
coloumbs
Explanation:
the value of the charge on a proton is Coloumbs