What element has more valence electrons in flooring in few were energy levels than sodium

The semi-conductors on the periodic table are classified as

What are the two basic types of satellites

Kelly has come up with an explanation for why her sister is sometimes in a good mood and other times in a bad mood. she speculates that it is based on the hours of sleep her sister got the previous night. this explanation for her sister's behaviors is an example of a(n)