Ch 5 The Periodic Table

Atoms of the most reactive elements tend to have

Two highly reactive elements in Period 2 are the metal lithium and the 

Which element is found in most of the compounds in your body except for water?

In a modern periodic table, elements are arranged in order of

At room temperature, none of the metals are

In a periodic table, a set of properties repeats from

The unit for atomic mass is

As you move from left to right across a period, the number of valence electrons

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

Which of the following Group 1A elements is the most reactive?

Among the alkali metals, the tendency to react with other substances

Which statement is NOT true about the elements fluorine, chlorine, and iodine?

Which elements are all gases at room temperature?

Copper is an example of 

A member of the boron family has 3 valence electrons, while a member of the oxygen family has

Mendeleev's decision to leave gaps in his periodic table was supported by the discovery of

Elements that have the same number of valence electrons are

The usefulness of Mendeleev's periodic table was confirmed by 

Which of the following Group 7A elements is the most reactive?

The most reactive metals are the 

Which list contains only metals?

An element that is shiny and conducts electric current is likely to be a

How many periods does the periodic table have?

An atomic mass unit is

In the blank periodic table below, identify the segments labeled A and B.

Mendeleev arranged the elements in his periodic table in order of

Which element is found in nature only in compounds?

Group 7A of the periodic table contains the