Compounds and Molecules Test

**What is the difference in electronegativity between the elements in this molecule? CO**

.89

**Silver Nitrate Ag(NO3)2 can be classified as**

Pure substance, molecule

**Pizza can be classified as**

**Mixture, heterogeneous**

**Salt water is considered a pure substance**

False

**Salt is considered a Pure Substance**

True

What are molecules?

A chemical structure with 2 atoms that can be the same. Ex. O3 O2

What are compounds?

A chemical structure with 2 different elements. Ex. H2O

**When Beryllium bonds with Fluorine it will most likely be…**

Iconic

**When Beryllium bonds with Fluorine what will the ratio of atoms be?**

**1 Beryllium : 2 Fluorine**

**How many elements are in H2SO4?**

3

**What is the % ionic character for CO2?**

19

**Which element is has properties most like O?**

Se, S, Te, Po

**This type of compound is usually found in solid form..**

Ionic

**This type of compound has a higher melting point…**

Ionic

**How many valence electrons makes the shell full for Helium?**

2

**What is the percent ionic character for NaCl?**

70%

**Is NaCl considered an ionic bond, covalent, or a metallic covalent bond?**

Ionic

**In the event that H2O is covalent, would it be considered nonpolar or polar?**

Polar

What is the difference between nonpolar and polar?

**In NaCl, which element is the cation?**

Na

**In KI, what type of ion is I considered?**

Anion

**In the compound LiF, which is the anion?**

F

What type of atom (ionic)

metals & nonmetal

What type of atom (covalent)

nonmetals

Transfer or share (ionic)

Transfer

Transfer or share (covalent)

Share

Type of structure (ionic)

Crystalline

Type of structure (covalent)

3D molecular shape

Physical state (ionic)

Solid at room temp

Physical state (covalent)

liquid/gas

Melting point (ionic)

High

Melting point (covalent)

Low

Soluble in water (ionic)

Yes

Soluble in water (covalent)

Some, only polar

Conduct electricity (ionic)

Yes

Conduct electricity (covalent)

No

Do covalent bonds burn easy?

No

Are ionic bonds brittle and ridgid?

Yes

Polar ranges

.4-1.7

Nonpolar ranges

Less than .4

Unequal or equal (polar)

Unequal

Unequal or equal (nonpolar)

Equal

Copper Chloride is a compound with the chemical formula CuCl2.  What does the “2” tell you?

2 CL

If Boron bonds ionically, what will the ionic symbol be?

B3+

An atom that loses an electron is called a(n)_______.

Cation

An atom that gains an electron is called a(n)_______.

Anion

Which group on the PTE has the most reactive metals?

1

What is the symbol for Nickel if it gains 2 electrons?

Ni2-

Which element has the highest EN?

F

What is the air around us?

A mixture

Groups that lose valance electrons are…

1,2,13,14

What is the formula order?

Metal nonmetal