Chapter 4 - Atoms and Elements

Chemical symbols

________ are abbreviations of element names in a single or two- letter way.

periodic table

A(n) ________ is a table of elements arranged in increasing atomic mass, as well as into groups and periods.

Isotopes

________ are atoms that have the same proton number, but various neutron numbers.

heavy zigzag

With the exception of aluminum, metalloids are called elements along the ________ line.

dense nucleus

In the small, ________, the protons and neutrons are found; electrons are outside the nucleus.

smallest particle

An atom is the ________ to preserve an element's characteristics.

arrangement of electrons

The ________ is written in order to place the number of electrons in this atom from the lowest energy level to the highest.

atomic weight

The element's ________ consists of the average mass of all isotopes in a natural sample.

metallic nature of an element

The ________ increases the number of people going down and decreases throughout a period from left to right.

mass number

The total number of protons and neutrons in a nucleus is the ________.