Exam 2: The Structure of Matter

What are the fundamental particles of an atom?

A chemical compound is any quantity of _____.

A positively charged nucleus surrounded by negatively charged electrons in well-defined orbits is the _____ model of the atom.

When atoms of various elements combine,they form _____.

The only difference between x-rays and gamma rays is their _____.

The chemical element is determined by the number of _____ in the atom.

During beta emission,an atom releases _____.

The atomic number of an element is symbolized by the letter _____.

The first person to describe an element as being composed of identical atoms was _____.

An atom in a normal state has an electrical charge of _____.

The term "atom" was first used by the _____.

Rutherford's experiments in 1911 showed that the atom was composed of _____.

Aluminum has an atomic number of 13. How many protons does it have?

The innermost electron shell is symbolized by the letter _____.

The _____ is the least penetrating form of ionizing radiation.

When an atom has the same number of protons as another,but a different number of neutrons,it is called an _____.

The periodic table of the elements was developed by _____ in the late 19th century.

The smallest particle that has all the properties of an element is a(n)_____.

A neutral atom has the same number of _____ and electrons.

The shell number of an atom is called the _____.