2. Atoms & Elements

Which of the following atoms is expected to be the most chemically reactive?

Ozone is a molecule in the upper atmosphere that is made up of three atoms of _____.

How many electrons are present in a neutral atom of carbon?

How many protons are present in a neutral atom of carbon?

Which statement correctly describes the distribution of electrons in a water molecule?

Which of the following best describes an element?

What is the overall charge of a neutral atom?

How many protons are present in an atom of cobalt (Co)?

Which statement correctly describes the structure of an atom?

When are atoms most stable?

Why is it impossible for an element to have an atomic number of 110.5?

Which element is nuclear fusion least likely to produce?

Which of the following best explains the difference between a sulfur atom and a sulfur molecule?

How do atoms of copper differ from atoms of aluminum?

How many protons are present in a potassium ion (K^+)?