Unit 5: The Periodic Table

How many valence electrons do the most reactive elements tend to have

An Alkali Metal has two valence electrons and an Alkali Earth Metal has one valence electron.

Which element on the Periodic Table is NOT in the same period?

Going across the Periodic Table from left to right, elements become less _______ and more ______ in their properties.

What is the weighted average of the masses of the element's isotopes?

Which element is a Transition Metal?

Moving left to right on the periodic table the _______increases by exactly 1 from element to element.

In Group 1A, the elements have a tendency to react with other substances as they ______

Each row on the periodic table is called a _______ and each column is called a _______.

The most reactive metals are in the ______ groups and the most reactive nonmetals are in the _______ group.

Which element in the Earth's atmosphere is the most abundant?

Mendeleev arranged the known chemical elements according to increasing

Krypton is a Noble Gas.

Nitrogen is the most abundant element in the Earth's crust.

What is the most abundant metal in the Earth's crust?

Mercury is a liquid at room temperature.

The pattern of repeating properties of elements revealed in the periodic table is _________

The Atomic Mass Unit (AMU) is based on the mass of a

Which Halogen is the most reactive?

The number of valence electrons determines an element's chemical properties.

Which Alkali Metal is the most reactive?

Elements are classified as metals, nonmetals, metalloids, and periods.

Mendeleev's periodic table was useful because it allowed scientists to predict properties of unknown____.

Which of the following are true about Fluorine, Chlorine, and Iodine?

Most of the elements on the Periodic Table are ______, which are on the left of the zig-zag line.

The elements on the Periodic Table that touch the zig-zag line are known as_______.

Elements in group 7A are know as "salt formers". They are called_____.