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Chemistry Ch. 3
Question | Answer |
---|---|
What are ionic compounds? | combination of an anion & cation. [usually a nonmetal + metal] |
What are covalent compounds? | combination of 2 nonmetals |
What is an ionic bond? | when positive and negative ions attract each other |
A bond that results from sharing electrons is called a ___ bond | covalent |
The molecular formula provides the ___ ___ of atoms present in a compound. | actual number |
The empirical formula provides the relative ___ of atoms and is basically the ____ version of the molecular formula | ratio , simplified |
The structural formula ____ | uses lines to show how the atoms are connected or bonded to a compound |
The color blue usually represents the element:___ | nitrogen |
The color white usually represents the element:___ | hydrogen |
Diatomic means ____ | two atoms |
A ___ element has a bond with another atom of itself. | molecular |
Which element is not bonded to anything else? | atomic element |
How many diatomic molecules are there? | 7 |
The diatomic element starts at the element Nitrogen (N) and makes a 7, ending with ___ | astastine (At) |
What are the seven diatomic molecules? | 1. nitrogen 2. oxygen 3. fluorine 4.chlorine 5.bromine 6.iodine 7.astastine |
Diatomic molecules are bonded to ___ | itself |
A diatomic molecule is considered an: | element |
___ compounds occur when you have more than one atom bonded together to form a ___ compound | Molecular - covalent |
Rules in naming ionic compounds. | 1. the name of the cation (+) is written first and named as its elemental name. 2. the anion (-) is written with -IDE 3. use roman numerals if compound contains transition metal 4. if compound contains polyatomic ion, the name of polyatomic ion is use |
What does the roman indicate when naming a ionic compound? | charge of the cation (+) |
When ionic compounds are neutral in charge, total charge of the anion and cation must be equal but _____ | opposite in sign |
Cation? | postively charged ion |
Anion? | negatively charged ion |
___ is the only polyatomic ion with a charge of +1? | Ammonium - NH4 |
___ is the only polyatomic ion with a charge of -3? | Phosphate - PO4 |
Which polyatomic ions have a charge of -2? | 1. Carbonate - CO3 2. Sulfate - SO4 3. Sulfite - SO3 4. Chromate -CrO4 |
Chromate, Carbonate, Sulfate and Sulfite all share a charge of? | -2 |
Acetate, Hydroxide, Nitrate, Nitrite, Perchlorate, Chlorate, Permanganate and Cyanide all share a charge of ___ | -1 |
Acetate has a charge of __. The formula is __ | -1. CH3COO |
Hydroxide has a charge of __. The formula is ___ | -1. OH |
Nitrate has a charge of __. The formula is ___ | -1. NO3 |
Nitrate has a charge of __. The formula is ___ | -1. NO2 |
Perchlorate has a charge of __. The formula is ___ | -1. ClO4 |
Chlorate has a charge of __. The formula is ___ | -1. ClO3 |
Permanganate has a charge of __. The formula is ___ | MnO4 |
Cyanide has a charge of __. The formula is ___ | CN |
Prefix for one | mono- |
Prefix for two | di- |
Prefix for three | tri- |
Prefix for four | tetra- |
Prefix for five | penta- |
Prefix for six | hexa- |
Prefix for seven | hepta- |
___ are a type of compound that releases a __ ion when dissolved in water. | Acids. hydrogen |
Rules for naming binary acids: | 1. begin with hydro- 2. followed by root of atom 3. followed by ending -ic 4. ending w/ the word acid |
A polyatomic ion is __ | |
What is a molecular element? | |
What is an atomic element? | |
(OH)2 is called : | hydroxide |
(NO)2 is called: | nitrite |
(NO)3 is called: | nitrate |
The sum of all the molar masses present in a compound is called the ___ | formula mass |
The mass percent is the element's ____ of the compound's ___ | percentage - total mass |