Which electron configuration represents an excited state for an atom for calcium

1. 2-8-7-1

2. 2-8-7-2

3. 2-8-7-3

4. 2-8-8-2

The half reaction of an oxidation-reduction reaction shows that iron gains electrons. What does this electron gain mean for iron? ОА. It is neutralized. OB. It is oxidized. ОС. It is reduced. OD. It has dissolved. ОЕ. It has precipitated.

If a student requires 6.5 hours to read a 350 page novel, determine the time he would need to read a 500 page novel

If i rub a balloon on a piece of paper then hold it against my head my hair will stand up why is that?

The volume of a liquid is often given in

Which unit is used for measuring atomic mass?

A covalent bond in which electrons are shared unequally

Transferring or sharing electrons between atoms forms

The most common element in the atmosphere are

What Is the name of the force that holds together the sub Tomic particles of the nuclear?

Henry Moseley used X-ray experiments to determine the atomic number of elements. How did his discovery contribute to the development of the periodic table? A. It confirmed that elements should be arranged in strict order of increasing atomic mass. B.