1. CHEMISTRY Chemical Analysis, Electronic Structure and Rate of Reaction Flashcards
What is the minimum amount of required to cause a reaction is called?
Activation energy
What is a substance that increases the rate of a chemical reaction without being used up in process?
Catalyst
In exothermic reactions, heat energy is…
transferred to the surroundings
In endothermic reactions, heat energy is…
taken in from the surroundings
What is a pure substance?
A substance which only contains one type of element or compound
In paper chromatography, what is the mobile phase? (the solvent)
Water
In paper chromatography, what is the stationary phase?
Absorbent paper
How do you test for chlorine?
Chlorine gas turns damp indicator paper white
Impure substances are…
mixtures
What group are known as the alkali metals?
Group 1
What group are known as the halogens?
Group 7
What group are known as the noble gases?
Group 0
Name the three states of matter
Solid, liquid and gas
Name the three types of strong chemical bonds
Ionic bonds, covalent bonds, metallic bonds
What is a covalent bond?
A shared pair of electron between atoms
What is an ionic bond?
A strong electrostatic force of attraction between the positive metal ion and the negative non-metal ion
Name three properties of Ionic compounds
High melting point
High boiling point
Does not conduct electricity when solid
The attraction between the positive ions and the delocalised negatively charged electrons
Metallic Bonds
What charge are protons?
Positive
What charge are neutrons?
Neutral
What charge are electrons?
Negative
How many electrons can take up the 3rd shell?
8
How many electrons can take the 1st shell?
2
How many electrons can take the 2nd shell?
8
