Unit 5: Periodic Table

Mendeleev arranged the known elements in a table according to

The column on the far left of the periodic table contains the________.

On the periodic table a column is a ______.

Reactivity ________ from top to bottom.

Mendeleev gave the name _______ to an unknown element he predicted would have the similar properties as aluminum

The standard on which the atomic mass unit is based on the mass of a _______.

Halogens ______ easily with metals.

Moving from left to right across a row of the periodic table, the atomic number_____

The atomic mass of an element is a _____ average of the masses of the elements _____.

From left to right across a periodic table the elements become less _____ and more ______.

Atom of the most reactive elements tend to have how many electrons?

Why Did Mendeleev make a periodic table?

Mendeleev predicted that the element he named eka-aluminum would have a

What is used to define an atomic mass unit?

Fertilizers usually contain 2 elements from Group 5A. They are ______.

_______ is found in most of the compounds of your body except for water.

The usefulness of Mendeleev's periodic table was confirmed by the discovery of elements with__________

Most metals are ductile, malleable, good conductors of electric current and some are ______.

One way to demonstrate reactivity among alkaline earth metals(Group 2A) is to observe what happens when thay are ______.

To keep some elements from reacting, some highly reactive elements are stored in _______.

The pattern of repeating properties of elements revealed in the periodic table is known as the ________.

The tendency of an element to react chemically is closely related to the number of ______ in an atom of the element.

Fluorine, Chlorine and Iodine from group 7A are all _____.

Halogens are __________ to the noble gases next to them.

How many valence electrons does an alkali metal have?

Does Group 1A or 7A have more electrons?

Why is sulfur not found in nature as a compound?

Mendeleev used the properties of _____ in his table to predict properties for undiscovered elements.

On the periodic table Group 3-12 contain ________.

The whole number on the periodic table represents

There are 4 parts of information given for each element. Which one of these is NOT given?

How many valence electrons do alkaline earth metals have?

At room temperature ____ of the metals are gases.

The number of valence electrons that an element has determines its

The atomic number increases by ___ from element to element.

Elements can be classified as ________.

Mendeleev arranged the elements with _______ in the same column.

Which one of these did Mendeleev NOT know about each element?

Halogens are _______.

At room temperature which metal is liquid?

What is the most reactive halogen (Group 7A)?

On the periodic table a row is a ______.

Sodium from Group 1A (Alkali Metals) is found in Nature only in Compounds because _________.