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30 Cards in this Set

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_____ organized the element in a useful chart according to their ___ _____.
Mendeleev

atomic mass
How is Mendeleev's table different from the periodic table used today?
The current table is organized according to atomic number not atomic mass.
What was an important feature of Mendeleev's table.
Mendeleev left blanks in his table because he knew more elements would be found.
_____ came up with the periodic table organized by atomic number.
Moseley
What determines the chemical properties of an element?
The number of electrons in the outer most energy level.
The ____ the electrons are to the nucleus, the weaker the electron.
closer
Give the maximum number of electrons in each energy level.
1st energy level - 2
2nd energy level - 8
3rd energy level - 18
4th energy level - 32
In order for an element to be stable, how many electrons are needed in the outer most energy level?
8 electrons
The __ ____ is the number of electrons in each energy level.
electron configuration
The electrons in the outermost level are known as the __ ___.
valence electrons
In looking at the periodic table, all elements in vertical columns are known as ___ or ______.
groups or families
What do the elements in groups have in common?
They all have the same number of valence electrons.
Group 1, found at the left side of the periodic table, are known as ____ ____.
alkali metals
Group 2 is the family known as ___ ___ _____.
akaline earth metals
The family in the middle of the table (columns 3-12) are strong metals called __ ___.
transition metals
Give the name of the groups 13-18.
13 - Boron Group
14- Carbon Group
15 - Nitrogen Group
16- Oxygen Group
17- Flourine Group
18 - Noble Gases
The three classes of elements:
1
2
3
1. metals
2. nonmetals
3. metalloids
____ of the elements on the periodic table are metals.
3/4
List the common charactertistics of metals:
1
2
3
4
1. luster
2. malleable
3. ductile
4. conductive - heat/electricity
_____ have both metals and nonmetal properties.
Metalloids
_______ metals have a slight conductive property which allows scientist to control the amount of electricity flowing through the metal.
Semiconductor
Characteristics of nonmetals:
1
2
3
1. no luster
2. not malleable or ductile
3. gaseous state
4. poor conductors
____ is a substance that produces ions upong dissolving.
Electrolytes
A bond that involves ____ one or more pairs of electrons between two atoms is called _____ ______.
sharing

convalent bonding
Two atoms of the same element that bond together to form a unit is called __ ___; like H2 or 02.
diatomic molecule
Many ____ consist of diatomic molecules.
gases
____ is an element that exists naturally as a diatomic molecule.
Hydrogen
When an atom shares two electrons in order to bond, it is called __ ___.
double bond
An organic compound will always contain _______.
carbon
The basic unit of a covalent compound is the ___.
molecule