Compounds and Molecules Test
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52 Terms
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**What is the difference in electronegativity between the elements in this molecule? CO**
.89
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**Silver Nitrate Ag(NO3)2 can be classified as**
Pure substance, molecule
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**Pizza can be classified as**
**Mixture, heterogeneous**
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**Salt water is considered a pure substance**
False
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**Salt is considered a Pure Substance**
True
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What are molecules?
A chemical structure with 2 atoms that can be the same. Ex. O3 O2
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What are compounds?
A chemical structure with 2 different elements. Ex. H2O
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**When Beryllium bonds with Fluorine it will most likely be…**
Iconic
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**When Beryllium bonds with Fluorine what will the ratio of atoms be?**
**1 Beryllium : 2 Fluorine**
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**How many elements are in H2SO4?**
3
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**What is the % ionic character for CO2?**
19
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**Which element is has properties most like O?**
Se, S, Te, Po
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**This type of compound is usually found in solid form..**
Ionic
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**This type of compound has a higher melting point…**
Ionic
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**How many valence electrons makes the shell full for Helium?**
2
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**What is the percent ionic character for NaCl?**
70%
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**Is NaCl considered an ionic bond, covalent, or a metallic covalent bond?**
Ionic
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**In the event that H2O is covalent, would it be considered nonpolar or polar?**
Polar
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What is the difference between nonpolar and polar?
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**In NaCl, which element is the cation?**
Na
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**In KI, what type of ion is I considered?**
Anion
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**In the compound LiF, which is the anion?**
F
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What type of atom (ionic)
metals & nonmetal
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What type of atom (covalent)
nonmetals
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Transfer or share (ionic)
Transfer
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Transfer or share (covalent)
Share
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Type of structure (ionic)
Crystalline
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Type of structure (covalent)
3D molecular shape
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Physical state (ionic)
Solid at room temp
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Physical state (covalent)
liquid/gas
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Melting point (ionic)
High
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Melting point (covalent)
Low
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Soluble in water (ionic)
Yes
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Soluble in water (covalent)
Some, only polar
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Conduct electricity (ionic)
Yes
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Conduct electricity (covalent)
No
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Do covalent bonds burn easy?
No
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Are ionic bonds brittle and ridgid?
Yes
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Polar ranges
.4-1.7
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Nonpolar ranges
Less than .4
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Unequal or equal (polar)
Unequal
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Unequal or equal (nonpolar)
Equal
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Copper Chloride is a compound with the chemical formula CuCl2. What does the “2” tell you?
2 CL
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If Boron bonds ionically, what will the ionic symbol be?
B3+
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An atom that loses an electron is called a(n)_______.
Cation
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An atom that gains an electron is called a(n)_______.
Anion
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Which group on the PTE has the most reactive metals?
1
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What is the symbol for Nickel if it gains 2 electrons?
Ni2-
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Which element has the highest EN?
F
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What is the air around us?
A mixture
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Groups that lose valance electrons are…
1,2,13,14
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What is the formula order?
Metal nonmetal
Note 
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