Ch 9- Lesson 1: Organizing the Elements

An element's _______ can be predicted from its location on the periodic table.

Another name for a group is called a

Particles that have no charge are

Positively charged particles are called

The average mass of all the isotopes of an element is called

Moving across the table from left to right, one finds, in order,

An element's symbol is an abbreviation in English or _______.

Isotopes are different forms of the same element.

The atomic number decreases from left to right.

Negatively charged particles are called

Every atom of the same element has the same number of protons.

The very center of the atom is the

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

The predictability is the reason that the periodic table is so useful to

An element with atomic number 12 is located to the ______ of an element with atomic number 11.

The modern periodic table is arranged in order of increasing

The rows in the periodic table are called

Information on the periodic table for each element includes

Mendeleev arranged his periodic table in order of increasing atomic

On the periodic table, elements in the same column have similar