They are made up of particles that are arranged in a repeating pattern.
Types of Metals (alkali earth metals and transitional metals)
Answer:
x=30
Explanation:
I will try to explain with a drawing.
This is a rule of three.
If you are wondering what the rule of three is. It's when u have 3 informations and you solve.
<h2> refer the attachment</h2>
<h2>If it is correct so mark as brainlest answer!</h2>
The existence of spectra can help the existence of atoms by expanding and multiplying in the law of London Dispersion