Covalent Compounds

mono

1

deca

10

di

2

hydrogen atoms need ___ valence electrons to become stable

2

How many valence electrons does the compound Sulfur trioxide have?

24

tri

3

How many valence electrons does the compound CCl4 have?

32

tetra

4

penta

5

hexa

6

a triple bond involves the sharing of

6 electrons

the element oxygen has _________ valence electrons and needs to add ________ electrons to complete its octet

6,2

hepta

7

How many valence electrons does the compound PH3 have?

8

most atoms need ___ valence electrons to become stable

8

octa

8

when forming a chemical bond, the goal is to achieve _________ electrons in the outer most energy shell

8

nona

9

carbon dioxide

CO2

7 diatomic molecules formed by the diatomic elements:

H2, N2, O2, F2, Cl2, Br2, I2

water

H2O

hydrogen monoiodine

HI

dinitrogen pentoxide

N2O5

tetraphosphorus pentoxide

P4O5

tellurium tetrabromide (Tellurium is number 52 on the periodic table)

TeBr4

NH3

ammonia

Compound:

any substance with two or more different elements held together by chemical bonds

when atoms share valence electrons, a ___________ is formed

covalent bond

when two nonmetals form a chemical bond, the bond is a.....

covalent bond

B2C

diboron monocarbide

what is the name of the compound N2S5

dinitrogen pentasulfide

what is the name of the compound P2O?

diphosphorus monoxide

the number of valence electrons for an atom of any element is found on the periodic table by what?

group (column) number

the electrons involved in bonding are.....

in the outemost energy level

Where are valence electrons located in the atom?

in the outermost energy level (shell)

2 types of chemical bonds we covered

ionic and covalent

what type of diagram uses dots arranged around chemical symbols to represent valence electrons?

lewis structure

In ionic bonds, electrons are lost by a ________ atom and gained by a ________ atom

metal, nonmetal

In covalent bonds, electrons are shared between what atoms?

nonmetal and nonmetal

O2

oxygen

single covalent bonds-

shares one pair of electrons

triple covalent bonds-

shares three pairs of electrons

double covalent bonds-

shares two pairs of electrons

typically, when two atoms form a chamical bond, the expected result is that...

the outer energy levels of both atoms will be completely filled

diatomic molecules form when....

two atoms of the same nonmetal element join together to form a covalent bond

covalent bonds always form between.....

two nonmetal atoms

What type of electrons are shared in covalent bonds?

valence