Atoms and Quantum Theory

The ____ is one kind of particle that makes up the atom and carries a positive charge.

Compared to protons, electrons have:

What is the net charge of an atom with the same number of protons and electrons?

A common isotope of iron has a mass number of 56. How many protons and neutrons does this atom have in its nucleus?

Atoms with the same number of protons but different numbers of neutrons are called:

Looking at your periodic table, the atomic number represents the:

In order for an atom to be considered stable, what is the general rule that must be followed (this rule does have exceptions, but works for most atoms)?

Protons and neutrons are found grouped together in the:

Electrons that are in the outer-most shell of the atom are considered to be in the:

Do any of the atom diagrams below represent atoms of the same element?

Which of the following is a TRUE statement about neutral atoms?

The periodic table notation for carbon-13 is shown below _______ C 6 Carbon _______ Referring to this figure, how many protons, electrons, and neutrons does carbon-13 have?

The periodic table notation for silicon (Is) is shown below _______ Si 14 Silicon ________ A neutral atom of silicon has how many electrons?

The noble gases such as helium and xenon do not form chemical bonds with other elements because they:

Phosphorus has an average atomic mass of 30.974 amu. What isotope of Phosphorus are you most likely to find should you take a random sampling of Phosphorus from the Earth?

The diagram shows a spectrum. The different colored bright lines represent:

Which of the following is evidence that electrons in atoms cannot have any amount of energy they would like but instead are only allowed to have certain specific amounts of energy?

An ion of iodine-127 has a charge of +5. How many electrons does it have?