Molecules
What is a molecule?
A combination of at least two atoms in a specific arrangement held together by chemical bonds
What does a subscript indicate?
Subscripts indicate number of atoms of each element present in the formula.
Name the following compound: FeO
Iron Oxide
What is the charge of a carbon element with 3 extra electrons?
3- charge.
What is an isotope?
An element that contains a different amount of neutrons and protons
Is H2 a compound or an element?
Define what "molecular compound" means?
Molecular compounds are composed of molecules and almost always contain only nonmetals.
Name the following compound: CoI3
Cobalt Triiodide
Can an element have a positive charge?
Yes, if electrons are removed, then the element becomes more positive
If you have the following structure:
AZX
what does each letter represent?
A = mass number (protons + neutrons)
Z = atomic number (number of protons)
X = chemical symbol for each element
Define diatomic molecules
Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements.
Is Hydrogen considered a metal or a nonmetal?
Write the formula for the following compound: triberyllium dinitride
Be3N2
Define what is a cation and what is an anion?
Cation: positively charged ion (loses electrons)
Anions: negatively charged ion (gains electrons)
How many protons, neutrons, and electrons are there in 1916X-2
Protons = 16
Neutrons = 3
Electrons = 18
Mention at least three of the 7 diatomic molecules that occur naturally.
H2, N2, O2, F2, Cl2, Br2, I2
Mention at least 4 of the greek prefixes for nomenclature
mono- (1), di- (2), tri- (3), tetra- (4), penta- (5), hexa- (6), hepta- (7), octa- (8), nona- (9), deca- (10)
True or False? The correct name for SiCl4 is monosilicone tetrachloride.
False, it is silicone tetrachloride. If the first element does not contain a subscript (or it is 1), no prefix is added.
Why do elements lose or gain electrons?
How would you write the name of 146C
Carbon-14
Explain what the "molecular formula" shows
It shows exact number of atoms of each element in a molecule
What is the structure for nomenclature in molecular compounds?
1. Name the first element in the structure.
2. Name the second element in the structure and change the ending for -ide.
True or False? The correct name for SF4 is sulfur tetrafluoride.
True, given that the first element does not have a subscript (it is 1), no prefix is needed.
Explain why Mg would most likely become a cation instead of an anion.
What do the following elements have in common?
53Br-, 47Kr, 56Rb+
They all have the same amount of electrons