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Chemistry > Pixl Test > Flashcards

Pixl Test Flashcards

1
Q

What is an atom?

A

Tiny particles of matter that have a mass

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2
Q

What is an element?

A

A substance made from atoms with the same number of protons

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3
Q

What is the charge and mass of a proton?

A

Charge is + and the mass is 1

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4
Q

What is the charge and mass of a neutron

A

It has no charge and has a mass of 1

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5
Q

What is the charge and mass of an electron?

A

The charge is - and the mass is negligible

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6
Q

Why do atoms have no overall electrical charge?

A

Number of protons is the same the number of electrons

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7
Q

What does the atomic number tell you?

A

The number of protons in an atom

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8
Q

What does the atomic mass tell you?

A

The number of protons and neutrons in an atom

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9
Q

What is a period?

A

A row across the periodic table

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10
Q

Why do elements in the same group of the periodic table have similar properties?

A

Same number of electrons in their outer shell

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11
Q

Why does calcium chloride, an ionic compound, have a high melting point?

A

It has strong attractions between the ions

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12
Q

Why is oxygen a gas at room temperature?

A

Forces between the molecules are weak

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13
Q

What is a polymer?

A

Molecules made up of long chains of covalently bonded carbon atoms

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14
Q

What is an ion?

A

A charged particle

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15
Q

What type of bonding occurs between metal and non-metals?

A

Ionic bonding

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16
Q

What type of bonding occurs between two non-metals?

A

Covalent bonding

17
Q

Where in the periodic table are the transition metals?

A

Middle section

18
Q

What does malleable mean?

A

Can be bent into a shape

19
Q

What properties of copper make it good for electrical wiring?

A

Very good conductor of electricity and not very reactive

20
Q

What properties of copper make it good for plumbing?

A

Easily bent into shape and not very reactive

21
Q

What is the relative mass of a neutron?

A

1

22
Q

What is an atoms mass number?

A

Number of protons and neutrons in an atom

23
Q

What are fullerenes?

A

Molecules of carbon shaped like closed tubes or hollow balls

24
Q

What is an isotope?

A

A different form of an element with the same number of protons but a different number of neutrons

25
Q

Describe the basic structure of graphite.

A

3 covalent bonds. Arrange in hexagons. No covalent bonds between layers. Delocalised electrons

26
Q

Describe the basic structure of diamond.

A

4 covalent bonds. Strong covalent bonds. No free electrons

27
Q

Why are fullerenes good industrial catalysts?

A

Have huge surface area

28
Q

What is chromatography used for?

A

A method to separate a mixture of soluble substances and identify them

29
Q

Name 3 different sources of water that can be made portable.

A

Surface water
Ground water
Waste water

30
Q

What is deionised water?

A

Has had the ions present in normal tap water removed

31
Q

What is the chemical definition of purity?

A

A substance made up of a single element or compound

32
Q

Describe how to carry out filtration.

A

Use when the product is an insoluble solid, using filter paper and a funnel you can separate the solid from the liquid. The liquid runs through and the solid is left behind in the filter paper

33
Q

What separation techniques should you use to separate a soluble solid from solution?

A

Crystallisation

34
Q

What happens to the forces between the particles on a solid as you melt it?

A

Particles gain more energy, increases vibrations and weaken the forces

35
Q

What is the pH value of a neutral substance?

A

7

36
Q

What is the pH value of an acid substance?

A

Anything from 1-6

Chemistry (1 decks)

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