M5 Periodic Table Notes Review (Chem)

The 'Atomic number' is defined as:

• The number of protons in the nucleus of an atom.

• The total number of neutrons and protons in an atom.

• The number of electrons in a neutral atom.

• The average mass of an atom of an element.

John Newlands proposed arranging elements by ________________________. He noticed that properties repeated after every 8 elements.

• atomic weight

• alphabetical order

• atomic number

• density

Dmitri Mendeleev made a table arranging the elements in order of atomic mass into columns with similar properties.

• True

• False

______________________________ in the table enabled Mendeleev to predict the existence of undiscovered elements.

• Gaps

• Colors

• Numbers

• Symbols

Henry Moseley refined Mendeleev’s table by arranging in order of increasing atomic _______________ instead of atomic mass. This resulted in a clear periodic pattern.

• number

• weight

• volume

• density

Elements in groups 1, 2, and 13–18 are called the representative elements. They possess a _______________ variety of chemical and physical properties.

• wide

• narrow

• limited

• restricted

Metals are elements that are generally _______________ when _______________ and clean, solid at room temperature, and good conductors of heat and electricity.

• Metals are elements that are generally malleable when heated and clean, solid at room temperature, and good conductors of heat and electricity.

• Metals are elements that are generally brittle when heated and clean, solid at room temperature, and good conductors of heat and electricity.

• Metals are elements that are generally gaseous when heated and clean, solid at room temperature, and good conductors of heat and electricity.

• Metals are elements that are generally liquid when heated and clean, solid at room temperature, and good conductors of heat and electricity.

Alkali metals are all the elements in group 1, except _______________. They are very reactive.

• hydrogen

• helium

• neon

• argon

Alkaline earth metals are in group ____. They are also highly reactive.

• 2

• 1

• 3

• 4

The two sets of inner transition metals, known as the lanthanide series and the actinide series, are located along the _______________ of the periodic table.

• f-block

• d-block

• p-block

• s-block