Answer: At the point when space experts take a gander at an article's range, they can decide its arrangement dependent on these frequencies. The most well-known technique stargazers use to decide the sythesis of stars, planets, and different articles is spectroscopy. This spread-out light is known as a range.
Explanation:
The charge would be -2 because there are 2 more electrons than protons, and electrons have a negative charge.
Lithium, sodium, potassium, rubidium, cesium, and francium
