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MIS Chapter 7 Science Study Guide
MIS Chapter 7 Science Study Guide
30
Science
8th Grade
02/03/2014

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Term
Periodic
Definition
Something that occurs at regular intervals
Term
This is how Mendeleev grouped the elements in 1869
Definition
by increasing atomic mass
Term
Mosley
Definition
British scientist who organized the periodic table by increasing the atomic number
Term
nonmetals
Definition
elements to the right of the zigzag line on the periodic table
Term
most metals are
Definition
solid at room temperature
Term
80% of the elements in the periodic table are
Definition
metals
Term
Property of alkali metals (Group #1)
Definition
They are soft solids that are very reactive
Term
Alkaline-earth metals (Group #2)
Definition
Metals that have two outer-level electrons
ex: magnesium, calcium and beryllium
Term
Alkali metals and Alkaline-earth metals
Definition
are the two groups with the most highly reactive metals
Term
Elements on the periodic table are arranged in order of
Definition
increasing atomic number
Term
Number of outer level electrons the Oxygen family has
Definition
6
Term
Elements that make up the compound baking soda
Definition
Sodium, Hydrogen, Carbon, Oxygen
Term
Sulfur 34 has
Definition
16 protons, 16 electrons, and 18 neutrons
Term
Name of the element with a chemical symbol of K
Definition
`Potassium - has 19 protons
Term
Periods
Definition
The horizontal rows on the periodic table - there are 7 periods
Term
Groups
Definition
There are 18 groups on the periodic table - the elements in each vertical column that have similar properties
Term
This element is a metalloid
Definition
Ge - Germanium
Term
These are all non metals
Definition
Se, Br, Kr
Term
Group on the periodic table that Lanthanide and Actinides belong to
Definition
Transition metals and it is found below the other elements on the table
Term
Boron is in what group number
Definition
Group 13
Term
How many metalloids are in the Boron family
Definition
one
Term
This is the order the regions are arranged on the periodic table if you are reading left to right
Definition
metals, metalloids, nonmetals, noble gases
Term
Transition metals
Definition
Metals in groups 3-12
Have 1 or 2 valence electrons
Hard, shiny, ductile
Ex: Gold
Term
Chemical Symbol P
Definition
Phosphorus
Term
Lithium, sodium, and potassium all have similar chemical properties because
Definition
they are in the same family
They are alkali metals
Each has 1 valence electron
Term
Hydrogen
Definition
has one valence electron but shares no other characteristics of group one elements
A nonmetal - on the metal side of the periodic table - that only has one outer level electron
Term
Halogens (Group #17)
Definition
Reactive non metal
7 Valence electrons
EX: Chlorine
Term
Noble Gases
Definition
Do not easily react with other elements because their outermost (valence) electron shell is full
Term
Noble Gases (Group #18)
Definition
8 valence electrons
Unreactive
Ex: Neon
Term
From an elements placement in the periodic table
Definition
you can predict its properties
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