Unit 5 Periodic Table

Mendeleev used the ____ of elements to sort them into groups.

• atomic mass

• shape
• color
• atomic number

The periodic table organizes the elements into vertical ____ and horizontal ____ in order of increasing _____.

• rows, columns, atomic mass
• categories, sections, atomic weight
• layers, tiers, atomic radius
• groups, periods, atomic number

The table is constructed so that the elements that have similar chemical properties are in the same ______.

• group
• period
• column
• row

The Group 1A elements are called _____, and the Group 2A elements are called ______.

• alkali metals, alkaline earth metals
• metalloids, nonmetals
• halogens, lanthanides
• noble gases, transition metals

The elements in Group 1A through 7A are called the ______ elements.

• alkaline
• transition
• representative
• noble

The nonmetals of Group 7A are ______, and the _____make up Group 8A.

• halogens and noble gases
• noble gases and halogens
• alkaline earth metals and lanthanides
• alkali metals and transition metals

Between 2A and 3A, there are ______ metals in periods in 4 through 7 and _____ metals in periods 6 and 7.

• transition; inner transition

• transition, outer transition

• outer transition; inner transition

• outer transition; transition

True or False. Mendeleev arranged the elements in order of increasing atomic number.

• True
• True and False
• True and False and Maybe
• False

True or False. There are six periods in the periodic table.

• There are eight periods
• True
• There are six periods
• False

How many periods are in the periodic table?

• 8
• 7
• 10
• 12