<span>He discovered that every atom contains a nucleus where all of its positive charge and most of its mass are concentrated</span>
D-1 electron in their outer energy level.
<h3>Because it is harmful for school environment.</h3>
Potassium Metal Is Explosive— Do Not Use It! The reaction of sodium with water is a spectacular and essential classroom demonstration. Many teachers want to show also the more violent reaction of potassium. We propose not to do so because explosions can happen even before the metal is in contact with water.
<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em>
The total number of atoms : N = 8.95 x 10²²
<h3>Further explanation</h3>
Given
3 grams of Neon
Required
The number of atoms
Solution
mol of Neon :
= mass : Ar Neon
= 3 g : 20,1797 g/mol
= 0.1487
The number of atoms :
N = n x No(No=Avogaro's number)
N = 0.1487 x 6.02 x 10²³
N = 8.95 x 10²²
I chemical reaction how energy involves in breaking chemical bonds well first off you have to get carbon dioxide plus Carmen dioxide equals air right well that’s wrong carbon dioxide equals Nancy Pelosi equals such a tourist mall