Atomic Theory
What was J.J Tompson's model called?
The Plum-Pudding Model
What are Covalent Bonds?
pairs of electrons are shared by atoms.
Draw the stick diagram:
C and O
(there are 10 electrons)
*C*(triple)*O*
What does "redox" stand for?
Reduction and Oxidation
What is the range of the pH scale?
0 to 14
What does the Greek origin word for "atom" mean?
indivisible
What are intramolecular forces?
strong chemical bond that hold atoms together.
Draw the dot diagram:
O, S and O
(there are 18 electrons)
*O*(triple)*S*(triple)*O*
LiH₄O₅
Li: O₅:
H: H₄:
O:
Li:+14 O₅:-10
H:-1 H₄:-4
O:-2
What is 4 on the pH scale?
Acidic
Which part of an atom is the lightest?
Electrons
What are the types of intramolecular forces?
Covalent, ionic and metallic bonds
Can there be a quadruple covalent bond?
No
What is oxygen's oxidation number?
-2, except in peroxides.
What is 7 on the pH scale?
Neutral
Who did the Gold Foil experiment?
Earnest Rutherford
How many electrons does a double bond have?
4
What are Lewis Dot Structures?
diagrams that represent valence electrons of atoms and/or molecules
What is the rule for hydrogen?
Hydrogen is +1 in most compounds, but is -1 when with metals
What is 10 on the pH scale?
Basic
What is the nucleus made of?
Protons and Neutrons
How many electrons does a triple bond have?
6
If 2 atoms have the same number of atoms, which atom will be the central atom?
The one with the lowest electronegativity
The total oxidation state of all ions is...
equal to the ion charge
What is 7.15 on the pH scale?
Basic