He ^ 2+
Helium has two electrons the 2+ means that it has lost its two electrons leaving it with none.
A layer above the earth that protects the planet from dangerous UV that are sent from the sun
Answer:
Ammonia can be described as a compound and a molecule.
Explanation:
A compound consists of two or more different types of atoms bonded together and a molecule consists of two or more atoms bonded together. They can be the same atoms or a combination of different atoms. The model shown fits both of these terms. It is not an element because an element consists of only one type of atom.
The more protons in the nucleus, the stronger the attraction of the nucleus to electrons. This stronger attraction makes it more difficult to remove electrons. Within a group, the ionization energy decreases as the size of the atom gets larger.
