Pass Papers Flashcards by Macy Kay

Diamond has a …. melting point

High

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A nano diamond contains a few …. atoms

Hundred

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Why can diamond be used for drill bits?

As they are hard

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What type of Atom in diamond made from?

Carbon

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Each atom in a Diamond is bonded to …. other atoms

Four

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What structure does a diamond have

A covalent

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In diamond ___ of the atoms are bonded together

All

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Nitinol is a Shape memory___

Alloy

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Why are mixture of metals harder than pure metal?

Because they have bigger atoms

They have no layors to slide

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What two factors do you have to consider when choosing the metal for braces?

Cost

Resistant to corrosion

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Word equation for Sulfer dioxide with oxygen

Sulphur Dioxide+Oxygen–> Sulfer Trioxide

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Sulfer dioxide is a

Compound

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When the pressure of the gas is increased the frequency of the collisions

Increases

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The minimum amount of energy that particles need to react is called the

Activation energy

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What’s one way if increasing the rate of reaction other than changing pressure

Using a catalyst

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Atoms with different numbers of nuetrons are called

Isotopes

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Compared with proton, the mass of an electron is

Very small

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What’s the acid are used to make ammonium nitrate

Nitric acid

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How is solid ammonium nitrate obtained from the solution

Evaporation

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I found the ammonium nitrate fertiliser on to a field of grass suggest what could happen to the grass

The grass will grow faster

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Why does solid magnesium chloride not conduct electricity

As the ions can’t move

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Why does magnesium irons move to the negative electrode

As it is positive which attracts

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What does this symbol mean —–>

Reversible reaction

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In an endothermic reaction the temperature of the surroundings

Decreases

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In a paper chromatography reaction to start and I should be drawn with a ruler and pencil give a reason for your answer

So it won't dissolve

Give three conclusion she can make from the students results in a paper chromatography

Two colours and fruit drink Three colours in Coke Some colours in the drink Are different

Why do you different compounds separate in a gas chromatography column

As different substances travel at different speeds

Large amount of caffeine can be harmful only one of the questions on the table can be answered by science alone what's the answer

Is there some caffeine in a certain brand of drink

Give two reasons one of the questions cannot be answered by science alone

Cannot be done by experiment Economic issues

Relative mass of a proton

What's relative mass of the neutron

One

What's relative mass of electron

Very small

What is the total number of protons and neutrons in an atom called

The mass number

Carbon reacts with oxygen to produce carbon dioxide | how many different elements are there I'm on molecule CO2

What is the total number of atoms in the molecule carbon dioxide

I need your method is used to measure the amount of carbon dioxide in the air give one reason for using an instrumental method

Accurate

What is the property of substance that have simple molecule

Have no overall electrical charge

Which one of the following questions cannot be answered by science alone

Should Iodine be added to salt in food

Give one reason why this question cannot be answered by science alone

Can't be done by experiment

A student producer so am I near nitrate by adding an acid to ammonia solution name the acid used

Nitric acid

Ammonia solution (ammonium hydroxide) is

An alkali

Student I did a few drops of solution which change colour when the reaction was complete. The solution added is an

Indicator

How is solid ammonia nitrate made from a solution of ammonia nitrite

Crystallisation

Why do you pharmacies ammonium nitrate on their fields

To help crops grow

State one reaction condition that can be changed when making polyethene

Pressure

What type of substance is lead iodide

Compound

What's the word equation for precipitation reaction

Lead nitrate+Potassium Iodide= lead iodide+ Potassium nitrate

Explain why the apparatus in figure 3 would not separate the lead iodide from the mixture

Paper is missing is a solid will go through

The student expected to get 5 g but only got 3 g give one reason why the mass the student got was less than expected

As some product may have got lost

Just one reason why spoons are electroplated

Improve lifespan

What is made from chlorine

Bleach

Why is hydrogen produced at the negative electrode and not sodium

As hydrogen is less reactive than sodium

What is the type of bond in a molecule of hydrogen chloride

Covalent

Why is hydrogen chloride a gas at room temperature

Hydrogen chloride has a low boiling point Hydrogen chloride is made of simple molecules

Name a gas produced at the positive electrode

Oxygen

At the negative electrode Aluminium ions gain electrons to produce aluminium what is this type of reaction called?

Reduction

Metals can be bent and shaped because the layers of atoms can

Slide

Graphite has

Strong covalent bonds

State one conclusion the student could make about the effect of the temperature on the rate of reaction

High temperature faster reaction

A student investigated how the surface area of marble chips affected the rate of reaction State 2 variables

Concentration of acid Mass of marble chips

Give one reason why are using a catalyst reduces cost

Catalyst is not used up

Explain in terms of structure, why some polymers are thermosettinf

Because they cannot slide and they have cross links

What does gas chromatography do to the substance

Separates

Give two reasons for using instrumental methods for analysis

Quick and accurate

Ionic compounds are made of

Giant lattices

Solid potassium chloride does not conduct electricity because the ions

Cannot move

What could students do to the potassium chloride to make it conduct electricity

Melt it

When the potassium irons reach the negative electrode they turn into potassium

Atom

Name the type of bond between the carbon and hydrogen atoms in methane

Covalent

Explain why methane is a gas at 20*C

Low boiling point has a small molecule

Why are alloys harder than iron

Particles cannot be layered therefore cannot slide

How could the solid lead iodide be separated from the solution

Filtering

Name the acid used to produce ammonium nitrate

Nitric

The reaction of Ammonia with an acid is a

Neutralisation reaction

Sodium chloride are held together by strong

Electrostatic forces