Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
what are electronegativity numbers used for
|
used to determine bond type/ polarity of a bond
|
|
|
ionic bond
|
transfer of electrons
|
|
|
covalent bond
|
sharing of electrons
|
|
|
what type of elements make up an ionic bond
|
a true metal and nonmetal; one element to the left and right of the zigzag line
|
|
|
what type of elements make up a covalent bond
|
2 nonmetals; both elements to the right of the zigzag line
|
|
|
what are 2 characteristics of ionic bonds
|
high melting point and soluble in water
|
|
|
what are two types of covalent bonds
|
polar and nonpolar/pure
|
|
|
explain polar
|
when the electronegativity difference is small but not zero; an unequal sharing of electons. (2 diff elements) ex. H20; C0
|
|
|
explain nonpolar/pure
|
when the electronegativity difference is zero; equal sharing of electons
|
|
|
molecule
|
no charge
|
|
|
polyatomic
|
has charge
|
|
|
define mole
|
an exact quantity
|
|
|
what are some example of representative particles
|
atoms, ions, molecules, formula units.
|
|
|
what are two equivalents for mole problems?
|
1 mole= AMU's in grams
1 mole= 6.02 x 10 to tha 23 r.p. |
|
|
what name is associated w/ 6.02 x 10 to tha 23 r.p.
|
molecule
|
|
|
what does AMU stand for
|
atomic mass unit
|
|
|
define molecular and formula mass
|
the sum of the atomic masses of the atoms in a compound
|
|
|
what is percentage composition?
|
the precentage of the total mass of a compound contributed by an element is the precentage of that element in the compound.
|
|
|
How do you find the precent compositon of an element in a compound
|
ex. take the total atomic mass of the element x 100; then divide by formula mass of the compound.
|
