Chapter 5 Review

Match the following person to their contribution.

• Henry Moseley

• Found a method to measure relative masses for atoms

• Dmitri Mendeleev

• Discovered argon and helium (led to the discovery of noble gases)

• William Ramsay

• Developed the periodic table of elements

• Stanislao Cannizzaro

• Defined atomic number, and organized periodic table by atomic number

Something is​ (a)   if it repeats again and again.

• periodic
• atomic
• reactive
• ionic

In the periodic table, the columns are called ​ (a)   and the rows are called ​​ (b)   .

• groups
• periods

In the periodic table, Group 18 carries a special group of elements called​ (a)   . These elements are ​ (b)   because their ​ (c)   is full.

• noble gases
• stable
• outermost energy level

Put the noble gases in correct order.

• Neon

• Helium

• Argon

• Krypton

• Xenon and Radon

Drop the element types to where they belong in the periodic table.

b

c

d

a

e

Main-group elements

Actinides

Alkaline or alkaline-earth

Lanthanides

Transition elements/metals

Drop the block elements to where they belong in the periodic table.

b

c

d

a

f-block elements

p-block elements

s-block elements

d-block elements

The difference between an element in Period 2 to Period 3 is ​ (a)   . From Period 3 to Period 4 is ​ (b)   . From Period 4 to Period 5 is ​ (c)   . From Period 5 to Period 6 is ​ (d)   . From Period 6 to Period 7 is ​ (e)   .

• 8
• 18
• 32

Group 17 elements are very reactive (compared to Group 18 which is very stable). What are Group 17 elements called?

• Halogens

• Carcinogens

• Pathogens

• Alkali

Match the following block elements with their characteristics.

• Different characteristics (some are metals, some are gases)

• p-block

• A unique element with its own set characteristics (#1 in periodic table)

• s-block

• Radioactive

• f-block

• Good conductors, less reactive, some exist as free elements

• Hydrogen

• Not found in nature as free elements because they are reactive

• d-block