What does a halogen atom give off when it gains an electrons?

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?