Why do the noble gases NOT form compounds readily?

In an atom, electrons ____.

The energy levels of an atom are occupied by ____.

An atom with _____ valence electrons is most stable.

Most of the mass of an atom is found in its ____.

In the chemical formula H2O, how many atoms of oxygen are represented?

According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?

In a reaction that has one reactant and two products, the _____.

Atoms that gain electrons become ions with a _____ charge.

A soccer ball takes 20 s to roll 10 m. What is the average speed of the soccer ball?

When you graph the motion of an object, you put ____ on the horizontal axis and ____ on the vertical axis.

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