Elements and the Periodic Table

Locate the box in group 18 in the 4th period. what is the chemical reactivity of this element?

Helium, Neon, Argon, Krypton, Xenon, and Radon are from the same family. They are ___

Mendeleev discovered periodic patterns when arranging elements in order of increasing

Most metals are NOT

How many protons are in an atom of phosphorus?

Fluorine, chlorine, bromine, and iodine are a part of a family called

What name is given to the elements in Groups 3 through 12?

What information in the periodic table indicate the number of protons in an atom?

Elements with an atomic # higher than 92 are not found on earth. They must be made, or ___

Each element is given a specific___that consists of one or two letters.

What prediction did Mendeleev make that came true less than 20 years later? He__

In the periodic table, the most reactive metals are found

In an atom, the number or protons equals the number of

Most metals are in the ___ state at room temperature

Which of the following statements about transition metals is true?

The elements that do not ordinarily form compounds are

What is the atomic number of aluminum?

Mendeleev created the first periodic table by arranging elements in order of

What is the total number of electrons in an atom of sodium?

How many neutrons are in an atom of magnesium?

A column of elements in the periodic table is called a group, or ___

The elements in a column of the periodic table

The ___ is the very small center core of an atom.

What is the mass number of sodium?

Which particles in atoms have a negative electric charge?

Which group of elements is not likely to react?

Which property of bromine could you NOT predict because it is a non metal in the halogen family

Which group contains the most elements

How did chemists change Mendeleev's periodic table in the early 1900's?