Chemistry Topic 1
State the type of bonding found in Carbon Dioxide.
Covalent
The electrode at which positive ions become atoms
Cathode
Name the most reactive halogen.
Fluorine
Explain why increasing concentration of particles increases rate of reaction.
more particles per unit volume
Higher frequency of successful collisions
Name the 4 stages in mitosis.
Prophase, Metaphase, Anaphase, Telophase
State the full name of a bucky ball.
Buckminsterfullerene
AN OX - Anode Oxidation
RED CAT - Cathode Reduction
Chlorine + Potassium Iodide --> -------- + -------
Potassium Chloride + Iodine
Describe the role of a catalyst
Reduces activation energy
By providing an alternative route
Name of plant stem cells.
Meristems.
Describe the 3 key findings from Rutherford's gold foil experiment which led to the discovery of the nucleus.
- Some gold atoms went straight through
- Some gold atoms were defected at angles
- Some gold atoms bounced back after hitting something
State what is produced at the anode during the electrolysis of Na2SO4(aq).
Oxygen
Explain why argon is used to fill light bulbs (2)
noble gas
Unreactive
Name the catalyst used in Cracking
Iron Oxide
Describe 3 things that happen during prophase
Chromosomes condense
Nuclear membrane breaks down
Spindle fibers form
Determine how many sodium and chlorine ions there are in one mole of sodium chloride.
= 1.204x10^23
Calculate the pH of the solution formed when 10cm3 of hydrochloric acid (pH 1) is made up to 1000 cm3 with distilled water (3)
PH 3
Describe what colours you'd see when the first 3 alkali metals react.
Lithium - Red flame
Sodium - Orange flame
Potassium - Purple/lilac flame
Describe exothermic in terms of bond breaking and making
More energy released during bond making
Less energy used in bond breaking
Name the 3 different types of neurons
Sensory neurone
Relay neurone
Motor neurone
CaCO3 decomposes when heated to form calcium oxide (CaO) and carbon dioxide (CO2). How much calcium oxide is formed from 50g CaCO3?
28g
Write a balanced half equation for hydroxide ions
4OH- --> O2 + 2H2O + 4e-
Lithium reacts with bromine in order to form lithium bromide. Write the balanced equation for this reaction.
2Li + Br2 -> 2LiBr
Catalyst used in making Magarine
Nickel
Describe what happens at synapses. (3)
Neurotransmitters are released
diffuse across the gap
bind to the receptors on the post synaptic membrane