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Periodic Table

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False
True or False
There are 2 main classifications of elements
false
True/ Falso
More than 3/4 of the elements in the periodic table are nonmetals
true
Group 1 elements (except for Hydrogen) are known as Alakli Metals
True/ false
false
Group 13 elements are known as alkaline earth metals.
True/false
True
Group 17 elements are very highly reactive nonmetals known as halogens
True/ False
False
group 18 elements are known as transition metals.
True/ False
False
Metalloids have properties of both metals and inner transition metals
true/ false
group
a column on the periodic table
period
a row on the periodic table
representative elements
elements in groups 1, 2 , 13 to 18
metals
elements that are shiny and conduct electricity
transition metals
elements in groups 3-12
outer edge
atomic radii cannot be measured directly because the electron cloud surrounding the nucleus does not have a clearly defined
ION
A ____ is an atom, or bonded group of atoms that has a positive or negative charge
valence electrons
elements in the same group have the same number of
nonmetles
most of the elements in groups 16-18 are classified as
decreases
wha is the trends in atomic radii as you move from left to right across a period?
shielding by inner electrons
the trend in the atmic radii as you move down the group 1 elements is due to
8
How many electrons does an atom need in its outer level to be the most stable?
J.W. Dobereiner
A German chemist that observed that several elements with similar properties could be classified into sets of 3 Triads
J.A.R. Newlands
Found that when he arranged elements in increasing atomic mass the properties would be similar ever 8th element.
62
In 1865 there were ____ known elements.
Mendeleev
_________ is credited as the father of the periodic table because he was the first to publish and demonstrate his table
Mendeleev
He arranged the elements by increasing atomic mass.
Mendeleev
He placed elements with similar reactivity and properties in columns.
Mendeleev
He also left gaps to indicate that an undiscovered element should be there.
H.G.J. Moseley
_______________ an English chemist developed the concept of atomic number.
Periodic law
________________ When elements are arranged in order of increasing atomic number, their physical and chemical properties show a periodic pattern.
Groups or Families
_______________ the elements with similar properties and are aligned in vertical columns (18)
Periods
___________ the horizontal rows (7)
Traditional or Roman
____________ Roman numerals and letters
Arabic
_________ numbers and letters
IUPAC
_______ numbers 1-18
Alkali Metals
(group 1A except hydrogen) -
Highly reactive
Found in nature in compounds
Alkaline Earth Metals
(group 2A)
Highly reactive
Important minerals
Transition metals
(B groups) -
Found in the middle of the periodic table
Innertransition Metals (2 pulled out rows)
Lanthanide series
Actinide series
Halogens
(group 7A)
Very reactive nonmetals
Are often found in compounds (salts)
Noble gases
(group 8A)
Very unreactive nonmetals
They seldom form compounds
S- block
group 1A and 2A and helium
P- block
group 3A to group 8A
D-block
transition metals, the middle of the periodic table. It contains a few exceptions.
F-Block
innertransition metals, the 2 rows under the table. The electrons of the f sublevel do not fill their orbitals in a predictable manner.
ION
Atoms can gain or lose electrons to form a ___
Octet rule
________________-atoms tend to gain, lose, or share electrons in order to acquire a full set (8) of valence electrons.
decrease
Ionization energies ________ as you move down a group
increase
Ionization energies _________ as you move from left to right across a period.
Successive ionization energy
The energy required to remove electrons beyond the 1st electron.
Electron affinity
The energy change that occurs when an atom gains an extra electron
Electronegativity
A measure of the ability of an atom in a chemical compound to attract electrons.
electronegativity
Increase as you move from left to right across a period. Except Noble gases
Decrease as you move down a group.
Flourine
The most electronegative element is ________
true
The Law of Octaves did not work for every known element. True/ False
Mendevee
The first periodic Table is creddited to