hydrogen 1p+, 1e _ helium 2p+, 2e _ electron proton neutron the atom
Post on 22-Dec-2015
229 views
TRANSCRIPT
Hydrogen1p+, 1e_
Helium2p+, 2e_
electron
proton
neutron
The Atom
Sub Atomic Particles
Name Mass Charge Location
Proton 1 AMU + 1 Nucleus
Neutron 1 AMU N/A Nucleus
Electron N/A -1 Electron
Cloud
Carbon6p+, 6e_
Oxygen8p+, 8e_
Molecules• Chemical bonds hold together two or more
atoms of the same or different elements– Ex: Nitrogen gas: N2
• Chemical bond: a union between the electron clouds of two atoms
• Molecules of compounds-elements in proportions never vary.
SODIUMATOM11 p+
11 e-
electron transfer
CHLORINEATOM17 p+
17 e-
SODIUMION
11 p+
10 e-
CHLORINEION
17 p+
18 e-
Do not post photos to Internet1 mm
Molecular Hydrogen(H2)
Molecular Oxygen(O2)
Water (H2O)
Covalent bonding
Click to view animation.
Water molecule Ammonia molecule
Hydrogen bond
H H
O
Slight negative charge at this end
Slight positive charge at this end
No overall charge
Multiple H bonds holding two molecules together
Liquid water Ice
In-text FigurePage 20
Na+
Cl–
– –
––
––
–
––
– –
+ ++
+
+
+
+
+
+
+
+
++ +
+
+
+
+
cohesion
evaporation