gen chem 4th qrtr FINALS

ions

ions

Are charged species formed from the gain and/or loss of an electron/s of a neutral atom.

anions

Are negatively charged ions,

cations

Are positively charged ions.

Electrons

When ions are formed, only the number of (???????) are changed, the number of ( Answer key #5 )  still remains the same for any atom.

protons

When ions are formed, only the number of ( Answer key #4 ) are changed, the number of ( ? ???)  still remains the same for any atom.

crystal lattice

The geometrical arrangement of the atoms, ions or molecules of the crystalline solid as points in space

ionic bond

The bond that holds these ions together in the lattice is called the ( ????). These are stabilized by ( Answer key # 8 ) of attraction between the positively-charged cation and the negatively-charged anion.

electrostatic forces

The bond that holds these ions together in the lattice is called the ( Answer key # 7 ). These are stabilized by ( ????? ) of attraction between the positively-charged cation and the negatively-charged anion.

ionic compounds

Are compounds that are made of cations and anions assembled together in a crystal lattice.

electrical neutrality

The most important consideration in writing the chemical formulas of ionic compounds is their ( ???? ).  When a cation and an anion combine, they must form an ionic compound with a net charge of zero.

binary compound

Are compounds that contain only two types of elements.

CATION

In writing Ionic Compound, you’ll name the ( ????? ) first?

CRISSCROSS

You can use the ( ???? ) method in writing the chemical formula of ionic compounds.

polyatomic ions

Are charged chemical species composed of two or more atoms that are covalently bonded to each other.

latin

What naming system is used by taking the stem name of the element’s Latin name?

stock

What naming system is used wherein the cation’s charge state is written as Roman numerals enclosed in parentheses beside the element’s name.

covalent bond

Are compounds that are formed when two or more nonmetals form a bond with each other.

covalent bond

The bond that holds these nonmetals together is stabilized by electron-sharing and is called a ( Answer key #18 ).

octet rule

A full valence shell is often characterized by a complete set of eight electrons, which is why this phenomenon is often called the ( Answer key #19 ).

deca-

Greek prefix of #10

penta-

Greek prefix of #5

tetra-

Greek prefix of #4

tri-

Greek prefix of #3

di-

Greek prefix of #2

mono-

Greek prefix of #1

nona-

Greek prefix of #9

octa-

Greek prefix of #8

hepta-

Greek prefix of #7

hexa-

Greek prefix of #6

Molar mass

 It is the mass of the substance per mole. It is often expressed in the unit grams per mole (g/mol).  For an element, the molar mass is numerically equivalent to its atomic mass.  For example, the atomic mass of a nitrogen atom is 14 amu, which means that nitrogen has a molar mass of 14 g/mol.  Note: Use the whole rounded off value of the atomic weights.

Molecular mass

is defined as the sum of the atomic masses of all elements in a covalent compound.

Chemical Formula

 The combination of elements that make a compound.

 Element symbols and numerical subscripts represent the number of each atom.

 The chemical formula follows the law of definite composition. It states that atoms combine in definite proportion by mass.

Percentage Composition

 This refers to the ratio of the mass of an element and the mass of the compound, multiplied by 100.

 It is the composition of a compound based on the percentage of the elements that comprise it.

 It can be represented as the percent by mass of each element in a compound.