chemistry ch624 cards

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1

chemical bonding

electrical attraction between nuclei and valence of electrons

2

ionic bonding

bond with an electrical attraction between opposing charged particles

3

covalent bond

sharing of electrons

4

metallic bond

attraction between sea of electrins and metal atoms

5

ionic and covalent is...

never purely ionic never purely covalent both degree depends on diff electrical activity

6

molecule

neutral group of atoms tht are covalenty bondes

7

molecular compund

chemical compoud with simplest unit is molecules

8

chemical formula

number of atoms of each kind in a chemical compound by using subscripts and symbols

9

molecular formula

shows the # of atoms in a molecular compound

10

fornular unit

simplest collection of atoms which form ionic compoud

11

bond length/ bond eneegy

average distance between 2points @ minimum pe/ energy reqyired to break down bond in order to form isolated atoms

12

rules tht go agaonst octet rule

hydrogen, BF3 yransitional metals. boron. oxygen. berrylium. sulphur

13

lattice energy

amount of energy tht is given out when one mole of ionic compound is for ed from its gaseous consistent ion.

14

strength of ionic bond is

governed by lattice energy

15

properties of ionic compound

conduct electric current only molten and solution state. high mp and bp. hard compared to molecular compounds

16

propertirs if metallic compound

high thermal and electrical conductivity. shiny. hard. malleable. ductile.

17

to decide stregth of ionic, covalent, metallic:

lattice, bond dissociation, heat of vaporization

18

vsepr?

repulsion between sets of valence electrons surrounding central atom causes sets to be oriented as far apart as possible to minimize repulsion

19

vsper stands for?

valence. shell. electron. pair. repulsion.

20

hybridiZation

mixing of orbitals from same atoms and about same energy to produce orbitals of same energy

21

intermolecular forces

short range forces between molecules

22

wht in intermolecukar forces?

dipole-dipole: attratiin between polar molecules hydrogen bonding: attration between hydrogenatum bonded to eitrer nitrogen, oxy, flourine

23

weakest to strongest force

london dispersion. dipole dipole. hydrogen. covalent. ionic

24

london dipersikn?

forces between nonpolar or between atoms