EVERYDAY SCIENCE

Detailed explanation-1: -Explain that argon has 18 protons and 18 electrons. There are 2 electrons on the first energy level, 8 electrons on the second level, and 8 electrons on the third energy level.

Detailed explanation-2: -Similarly, neon has a complete outer 2n shell containing eight electrons. These electron configurations make helium and neon very stable.

Detailed explanation-3: -There are eight electrons in the outermost energy shell for argon. The electrons in the outermost energy level of any atom are called the valence electrons.

Detailed explanation-4: -Argon has 18 electrons overall and 8 has in the outer shell.