Patterns in the Periodic Table

Front

What is the arrangement of the periodic table based on?

Back

The periodic table is arranged according to increasing number of protons (atomic number).

Front

What are elements that are shiny and conduct electricity and heat called?

Back

Metal.

Front

How did Mendeleev arrange the elements in the periodic table?

Back

Mendeleev arranged the elements by atomic mass.

Front

Which family is more reactive: Family 1 or Family 18?

Back

Family 1 is more reactive than Family 18.

Front

What do elements in the same group (column) of the periodic table have in common?

Back

Elements in the same group have the same number of outer electrons in the outer energy level.

Front

What are nonmetals?

Back

Nonmetals are elements that are generally not shiny, do not conduct electricity or heat well, and are often brittle.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number represents the number of protons in an atom and determines the element's identity.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals.

Front

What is the trend in reactivity for alkali metals as you move down the group?

Back

Reactivity increases as you move down the group of alkali metals.

Front

What is the difference between groups and periods in the periodic table?

Back

Groups are vertical columns that share similar properties, while periods are horizontal rows that indicate the number of energy levels.