CH 9 Atoms and the Periodic Table

A molecule made up of two atoms

Elements in group 18 that do not ordinarily form compounds and are usually nonreactive:

For an atom be neutral (zero charge) the number of electrons should equal the number of 

Elements in the same column in the periodic table have similar:

The deterioration of a metal due to a chemical reaction in the environment is called

A _____ can be used to represent objects really big or really small

Mendeleev put the elements into groups based on similarities, this is called:

Which category contains the most elements?

The center of an atom

Electrons are located in the 

Which is NOT a general property of metals

Most of the nonmetals are ________ at room temperature

An element's position on the periodic table tells you its:

The family of elements that has an element important to the chemistry of life:

Which of these is NOT a classification of metals

A material that can be drawn into long wires is considered

________ have some properties of metals and some properties of nonmetals

The outer planets are mainly made up of

The most reactive metals are found in group number

Mendeleev noticed a pattern when elements were in order of increasing

All of the following are chemical properties except:

The most reactive metals in the periodic table

The elements in Group 3 through 12, that are less reactive than metals in groups 1 and 2:

Size and temperature determine the ______ of a star.

___________ is a scientist who compared electrons orbit to planets orbiting the Sun

Horizontal row on periodic table

A column or group on the periodic table is also called a

The _________ shows the number of protons in the nucleus

Metals found in group 1 are called

Positively charged particles in the nucleus