Homework Help for Chemistry

 What happens to the atomic size of the elements in a group when you go from top to bottom of the group?

For transition elements, the number of valence electron is the same as _______.

For the representative elements, the number of valence electrons is the same as the _____.

 The elements of groups IA, IIA, IIIA, IVA, VA, VIA, VIIA and VIIIA are called main group elements or

What are the main energy levels where the valence electrons belong called?

The _______ of the atom describes the atom as having a nucleus at the center around which electrons move?

What describes how the electrons and distributed among the orbitals?

What principle states that no two electrons in the same atom can have the same set of four quantum numbers?

What principle states that the electrons fill the orbitals, one at a time, starting with the lowest orbital then proceeding to the one with higher energy?

Who discovered the uncertainty principle?

What principle states about the fundamental limitation that, for a particle as small as the electron, one cannot know exactly where it is and at the same time know its energy how it is moving?

What element is used in advertising signs?

What is the second most abundant element in the atmosphere?

What is the only gas in Group VIA in the periodic table

What is the most abundant element in the atmosphere?