C2 Flash Cards

Who First Suggested that Electrons orbit the Nucleus?

Name one difference and one similarity between an atom and an isotope.

How can isotopes be used to calculate the age of something?

Work out the relative formula mass of water (H2O).

How do chemists make it easier for them to count the relative formula mass of an atom or molecule?

Why are noble gases unreactive?

How does an atom become an ion?

Why can ionic compounds conduct electricity when dissolved in water or molten, but not when solid?

The first Group 1 elements were discovered in 1800. However they were not separated from their compunds until 1875. Why is this?

What is the charge of a HALOGEN?

Chlorine is a highly toxic gas which is used to kill bacteria in the water we drink. Why does the chlorine in the water not kill us as well?

Why are the melting and boiling points of an ion very high?

What is the difference between a single and a double bond?

What is the charge of both atoms in a covalent bond?

Do Covalent bonds have high or low melting and boiling points and why?

If a compound is easy-to-melt and a poor conductor of electricity, what type of bonding does it have?

Give 3 examples of a covalent lattice and their use.

What is the difference in the structures of a thermosoftening and a thermosetting polymer?

Why does metallic bonding allow the compound to conduct electrons?

What is an alloy?

What do these 'smart' materials do?
Photochromic
Thermochromic
Shape memory

How could buckminsterfullerene (C60), be used in the future to treat cancer infections?

How can chromatography be used to check what food colourings have been used in a sample?

Name each of these chemical reactions:
1. Gaining Oxygen
2. Losing Oxygen
3. Reacting an acid with an alkali or base.
4. Reacting two soluble compounds to form an insoluble product.
5. Using electricity to split a liquid or a solution.

Name the 5 factors that affect a rate of reaction.

If you were told that 1.27g of copper was used to maken 1.59g of copper oxide, how would you work out the formula for copper oxide?

What is the equation for calculating the Percentage Yield?

What is the advantage of using an ore that is 75% pure over an ore that is 25% pure?

What does a double-headed arrow for a reaction mean?

Name one equation to determine the rate of reaction.

How do you calculate the rate of reaction for a graph at a given point?

True or False?
In a reaction, every time two particles collide they react.

True or False?
The higher the concentration of a solution, the faster the particles will react.

In what reaction is iron used as a catalyst?

How does a catalyst help speed up the rate of reaction?

Name two factors that chemists need to take into account when planning an industrial process (reaction).

Do exothermic reactions emit heat into it's surroundings or absorb heat from around it?

What is produced when a base reacts with an acid?

Are neutralisation reactions exothermic or endothermic?

If Ammonia solution is dissolved in water, what is produced?

If sulphuric acid was used in a reaction to create a salt, what would the end of the salt's name be?

A salt is what type of compound?

How would you identify if a halogen compound is present?

Why can electrolysis not be done with mains electricity?

What is produced with the electrolysis of sodium chloride solution.

During electrolysis, what happens to the positively charged ions?