Periodic Table & Trends

Ionization energy is the...

• energy needed to remove the outermost electron.
• ability of an atom to attract electrons from another atom.
• Energy needed to start a reaction

• Energy needed to remove a proton

What did Mendeleev use for arranging elements?

• atomic number

• atomic mass

• group number

• element name

What were the blank spots on Mendeleev's periodic table?

• undiscovered elements

• ions

• isotopes

• radiation

What did Mosely use to arrange the periodic table?

• atomic mass

• atomic number

• molarity

• group number

A horizontal row of elements in the periodic table is called:

• column

• group

• period

• family

A vertical column in the periodic table is called:

• row

• group

• period

• table

In the modern periodic table elements are arranged by:

• valence electrons

• atomic number

• alphabetical order

• atomic mass

What law states that when elements are organized in order of increasing atomic number their chemical and physical properties will repeat?

• Periodic Law

• Periodicity Law

• Law of Property Repetition

• None of these

Which group of the periodic table is composed of inert (unreactive) gases?

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Ionization energy is the...

• energy needed to remove the outermost electron.
• ability of an atom to attract electrons from another atom.