The Atom
The Periodic Table
Bonding and Compounds
Mix and Match
Chemical Formulas and Oxidation States.
100
What is an electron?
The smallest subatomic particle with a negative charge
100
Is a group a column of elements or a row of elements and in which direction (horizontal or vertical)?
a column, vertical.
100
The octet rule states that atoms generally are most stable when they have _____ valence electrons.
8
100
How does a transition metal behave?
Like metal and a nonmetal.
100
What is an example of a chemical formula?
H20
200
Atomic number tells us.....?
The atomic number tells us the unique number of protons found in every atom of a particular element.
200
What is a period on the periodic table and what is another name for it?
A period is a row in the periodic table of elements, also knows as a SERIES.
200
The two ways atoms achieve stability is...
1. Atoms share electrons
2. Atoms with few valence electrons easily lose outer electrons.
200
What is the difference between a cation and an anion?
Cation has fewer electrons and an anion has extra electrons.
200
What is an oxidation state?
A positive or negative number showing the electric charge on an element when it forms a compound.
300
Describe an isotope
An isotope is an atom of an element that has a different number of neutrons compared with other atoms of that element.
300
Name three different types of elements.
Metals, nonmetals, transition metals, metalloids, alkali earth metals.
300
What is the difference between covalent and ionic bonds?
1. Covalent shares electrons, while ionic transfers electrons
2. Covalent bonds most often form between nonmetals, while ionic bonds most often form between a metal and a non metal.
300
What is the name of the elements that reside in group 17?
Halogens
300
What is the chemical formula for cesium oxide?
Cs2O
400
How many neutrons are in Sodium-25?
14
400
Where are the noble gases on the periodic table?
Group 18
400
What is polarity?
The unequal distribution of electric charge in a covalent bond.
400
What are the seven diatomic elements?
Hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine,
400
What is the chemical formula of Iron (III) Oxide?
Fe2O3
500
What is atomic mass and what is the SI unit for it?
Atomic mass is the weighted average of the masses of all the naturally occurring isotopes and the SI unit is unified atomic mass unit (u).
500
What is the electron dot notation for Na?
500
What is the difference between a polar bond and a nonpolar bond?
In a polar bond, two bonded atoms have unequal electronegativities, the one with stronger electronegativity will pull harder on the shared electrons. In a nonpolar bond, two bonded atoms exerts an equal pull on the shared electrons.
500
As you go down a group, atomic radius ______ as electronegativity _______. As you go across a period (left to right), atomic radius __________ as electronegativity ________.
increases, decreases.
decreases, increases.
500
Name these compounds:
1. BF3
2. CCl4
3. P2O5
1. Boron trifluoride
2. Carbon tetrachloride
3.Diphosphorous pentoxide