How do lithium, sodium, and potassium react with water?

What are two characteristics of alkali metals? Name two alkali metals.

What color is bromine water usually? What happens when it is shaken with an alkene?

Why is there less CO2 gas in the atmosphere now than there was in Earth's earliest atmosphere?

Name two greenhouse gases. What do they do?

Describe the composition of the earth's atmosphere.
What are the two most abundant gases? What percent of the atmosphere is made of CO2?
What percent is argon?

What is "cracking" in the hydrocarbon industry? Why is it important?

What is an alkene?

What is a polymer? Give some examples.

How did Mendeleev arrange elements into a periodic table? Why did he swap the positions of of iodine and tellurium in his table?

What were the key features of Mendeleev's periodic table?

Name three ways that human activity affects the level of CO2 of the atmosphere.

Name one way CO2 is released into the atmosphere that is not caused by humans or other living organisms

Describe the evolution of the earth's atmosphere in the first billion years

Describe the evolution of the earth's atmosphere in the 2nd and 3rd billion years.

Describe the evolution of the earth's atmosphere in the last billion years.

What is THERMAL DECOMPOSITION? Give an example

How is cracking done? Why does it require a lot of energy?

Why is carbon monoxide dangerous?

What is the difference between complete combustion and incomplete combustion? What are their products? Under which conditions does each occur?

Name two other compounds released when fossil fuels are burned, and how they contribute to pollution.

Name the pros and cons of using hydrogen as fuel.

Why are shorter hydrocarbons easier to ignite than longer ones?

The longer the hydrocarbon, the ______ the viscosity.
Name a very viscous fraction of crude oil

Why do longer hydrocarbons have higher boiling points? Why are they more viscous than shorter chain hydrocarbons?

What is a homologous series of compounds? Give an example

What is crude oil? What can it be used for? Name its fractions in order of increasing boiling point, and what they are used for.

What is natural gas?

Explain how crude oil is separated into fractions during fractional distillation. (5 marks)

Explain how cars produce nitrogen oxides