Unit 1- Bonding Flashcards Preview

Chemistry 11 > Unit 1- Bonding > Flashcards

Flashcards in Unit 1- Bonding Deck (25)
Loading flashcards...
1

what happens to potential energy when two things that are attracted and apart come together?

potential energy lowers
energy is released

2

what happens when things that are repelling and together move apart?

the potential energy lowers
energy is released

3

why is energy released by a system when bonds form?

kinetic energy is released because the electron transfer from the bond releases energy

4

what is ionic bonding?
show Lewis diagram

the attraction between metals and non metals

electrons are transferred from metals to non metals

Li-Cl

5

what is covalent bonding?
Lewis diagram

a force of attraction between non metals and non metals
they share electrons
F-O

6

explain VSEPR theory.

Valence Shell Electron Pair Repulsion Theory

Pairs in the shell of the outermost shell of the central atom of a molecule REPEL each other
the repulsion determines the shape of the molecule

7

name the shapes of the molecules

linear
planar
tetrahedral
trigonal pyramid
bent
linear

8

what are the angles of the molecular shapes?

180
120
109

9

know how to draw the L3D's

👍🏼

10

what is a pure covalent bond?
(non-polar)

the electron pairs are shared equally between the two atoms

11

what is a polar covalent bond?

the shared pair of electrons are closer to one atom than the other because of the difference in DEN values

12

know how to draw L3D's for pure and polar covalent bonds

👍🏼

13

what is potential energy?

stored energy between two things that are attracted or repelling
due to forces acting on an object

14

valence shell

The outermost shell containing electrons

15

valence electrons

the electrons in the outermost shell

16

valence

the number of electrons an element is capable of losing sharing or gaining
aka the charge on an atom when it forms a stable ion

17

molecule

two or more atoms held together by chemical bonds
molecules have a neutral charge

18

what do metals become when bonded?

cations (positive)

19

what do non metals become when bonded?

anions (negative)

20

draw an ionic bond (Bohr and Lewis)

y

21

draw a covalent bond (Bohr and Lewis)

y

22

dipole

one side of the molecule is slightly negative and the other is slightly positive

the larger difference in electronegativity the greater the dipole

23

DEN

The difference of electronegativity values

24

What does the DEN have to be to be considered ionic?

greater than 1.7

25

what is the formula for acid rain?

SO2 +H2O +O2 ---> H2SO4