Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
Group 1 Properties |
Alkali Metals. Soft Shiny when cut Low melting point highly reactive, especially with water More reactive if you move down |
|
|
Group 2 Properties |
Relatively soft metal Still have quite low melting points Very reactive |
|
|
Group 17 Properties |
Halogens Moving down they become less reactive Span across all physical states They have relatively low melting and boiling points, increasing as you go lower. |
|
|
Group 18 |
Noble Gases Stable Arrangement-Full outer shell Very Unreactive Gases at room temp |
|
|
Reaction Rate |
How fast a reaction proceeds |
|
|
How can a reaction rate be determined? |
Rate of dissapperance of reactants Rate of appearance of products |
|
|
Gradient |
Low- slow Steep- High |
|
|
What happens when chemicals react |
Bonds are broken Bonds are formed For this to occur particles must collide in a certain way. This is called collission theory |
|
|
The requirements that must be met before a chemical reaction to occur: |
-Reacting particles must collide -They must collide with a specific minimum amount of energy, called the activation energy -The particles must collide with a favourable orientation |
|
|
Ribosome |
Site of protein synthesis |
|
|
Mitochondria |
Produces energy for the cell |
|
|
Nuclear Pore |
Allows substances to exit the nucleus, mainly mRNA |
|
|
Pentagon |
Sugar |
|
|
Circle |
Phosphate |
|
|
Compare DNA and RNA |
RNA is single stranded Contains Uracil The Sugar is Ribose which has 1 more oxygen atom than deoxyribose |
|
|
What makes up a Nucleotide? |
1. Carbon sugar molecule 2. Phosphate group 3. 1 of 4 Nitrogen Bases, Adenine, Thymine, Guanine, Cytosine |
|
|
DNA Replication 1 |
An enzyme named Helicase unzips (breaks the hydrogen bonds between the DNA. The DNA is now split into two strands. The lagging strand and Leading strand. strands can now be used as a template for replication |
|
|
DNA Replication 2 |
For the leading strand, RNA Primase acts as a primer for the DNA polymerase to add matching nucleotides onto the new piece of RNA. |
|
|
DNA Replication 3 |
For the lagging strand, the same is done, except the RNA primase is more involved because of the different order and orientation of the lagging strand. |
|
|
Natural Selection |
Natural selection is the process where organisms with favourable traits are more likely to reproduce |
|
|
Transcription |
Occurs in the nucleus. RNA Polymerase connects complimentary base |
