The structure of the atom
All of the elements in a table, set up in periods (rows) and families (columns)
Periodic Table
Which atom has the atomic number of 66?
Dysprosium ( Dy )
Where are metalloids found on the periodic table?
They are found along the zigzag line.
What period are the noble gases located?
18
When do covalent bonds form?
When 2 nonmetals share their electrons.
0 charge, mass is 0, and is located in the nucleus
How much mass does the element Iron have?
55.8 ( 6 )
Where are metals found on the periodic table?
The left of the zigzag line.
What property do all of the elements in the Alkali Metals group have in common? ( Excluding Hydrogen )
They are all a metallic solid.
Valence electrons are...?
Electrons in the outermost orbital.
-1 charge, mass is 0, negative, located outside of the nucleus
Electron
Which atom has:
Atomic # + Protons - 79
Mass - 197
Neutrons - 118
Electrons - 79
Gold ( Au )
Where are nonmetals found on the periodic table?
To the right of the zigzag line.
How many elements are man-made?
24
Which groups on the periodic table want to lose electrons?
groups 1-13 metals.
+1 charge, mass is 1, positive, and is located in the nucleus
Protons
What is an isotope?
Atoms of the same element with a different number of neutrons.
What type of metal is Aluminum? ( Al
)
Metalloid
How many sections is the periodic table split into?
9
How do ionic bonds form?
When a positive (metal) and a negative (nonmetal) are bonded together.
An atom with the same number of protons and different electrons
Ions
What is the number of electrons in Al with a +3 charge?
Protons - 13
Is it a cation or an Anion?
10 electrons, cation
What are 3 physical properties of metals, nonmetals, and metalloids?
Luster ( the ability to reflect light ), Conductivity ( the ability to conduct electricity ), Malleability ( the ability of the substance to be hammered without breaking ), and Ductibility ( the ability of the substance to be pulled into a thin wire ).
How many elements are transitional metals?
38
How do Ions form?
When an atom does not have 8 valence electrons, it may try to get rid of or gain electrons, you then add or subtract electrons to get 8. It then becomes an ion.