Chapter 6 Flashcards
(23 cards)
How Dobereiner grouped the Periodic Table?
triads
What did Newlands contribute to the development of the Periodic Table?
He discovered the Law of
Octaves.
What is the Law of Octaves?
The properties of the elements
repeat every 8th element.
The person who developed
the first Periodic Table?
Mendeleev
How did Mendeleev organize
the Periodic Table?
By increasing atomic mass.
Why did Mendeleev leave
blanks in the Periodic
Table?
He predicted the properties of undiscovered elements.
What did Mosely determine?
The positive charge in the
nucleus.
How did Mosely arrange
the Periodic Table?
By increasing atomic
number.
The name for the vertical
columns on the Periodic
Groups or Families.
The name of the horizontal rows in the Periodic Table?
Period
The number of groups in the Periodic Table?
18
The number of periods in the Periodic Table?
7
The name for Group I in the Periodic Table?
Alkali Metals.
Why are Noble Gases called inert?
They don’t react.
The definition of electron affinity?
The energy change that occurs when an atom gains an electron.
The definition of electronegativity?
The ability to attract
electrons in a chemical
bond.
Some of the properties of metals?
malleable, ductile, high luster,
conduct heat and electricity.
Some of the properties of nonmetals?
Brittle, dull, not ductile, do
not conduct heat or
electricity.
What are metalloids?
They have the properties of
both metals &
nonmetals.
Where are the metals located?
On the left side of the Periodic Table.
The definition of atomic radius?
The distance between the center of the nucleus & the outermost electrons.
What happens when atoms gain electrons?
they get bigger
The definition of ionization energy?
The positive charge in the
nucleus.
