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Chemistry > C1 > Flashcards

C1 Flashcards

Learn C1

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1
Q

What is a element?

A

A Substance made from one type of atom.

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2
Q

What is a proton?

A

A positively charged particle that makes up part of an atom.

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3
Q

What is a neutron?

A

A neutrally charged particles that makes up part of an atom

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4
Q

What is an electron?

A

A negatively charged particles that is part of an atom.

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5
Q

How many different types of atoms are there?

A

118

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6
Q

What is a chemical mixture?

A

Two or more substances not chemical bonded together which can be separate.

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7
Q

What is a chemical compound?

A

Two or more elements chemically bonded after a chemical reaction.

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8
Q

What are the five hints for a chemical reaction taking place?

A

1: Fizzing or bubbling
2: Change in colour
3: Change in odour
4: Change in temperature
5: A solid is formed

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9
Q

What determines what element something is?

A

The number of protons the atom has.

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10
Q

What are the reactants in a chemical reaction?

A

The materials you start with in a chemical reaction.

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11
Q

What are the products in a chemical reaction?

A

The materials you end with in a chemical reaction.

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12
Q

What does aqueous mean?

A

It means dissolved in water or a solution.

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13
Q

What is a word equation?

A

An equation that contains only words.

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14
Q

What does dissolving mean?

A

When a solute is broken down in a solvent to form a solution.

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15
Q

What does solute mean?

A

Typcally a solid that is dissolved to form a solutions but liquids and gasses can be solutes aswell.

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15
Q

What does solvent mean?

A

A solvent is any substance, usually liquid, which is capable of dissolving one or several substances, thus creating a solution.

16
Q

What does solution mean?

A

A solution is where a solute is dissolved in a solvent.

17
Q

What does soluble mean?

A

It can be dissolved.

18
Q

What does insoluble mean?

A

It can’t be dissolved

19
Q

What is the melting point of a substance?

A

The temperature at which the substance turns from a solid to a liquid and vice versa.

20
Q

What is the boiling point of a substance?

A

The temperature at which the substance turns from a liquid to a gas and vice verse

21
Q

What is distillation?

A

The process of separating two or more liquids using that fact they have different boiling points.

22
Q

What is decanting?

A

The process of separating two or more liquids using that fact that they are immiscible.

23
Q

What does immiscible mean?

A

When two liquids are incapable of forming a homogeneous mixture when mixed.

24
Q

What does miscible mean?

A

When two or more liquids are capable of forming a homogeneous mixture when mixed.

25
Q

What does homogeneous mean?

A

When a substance is identical wherever you sample it.

26
Q

How do you separate an insoluble solid from a liquid?

A

Filtering.

27
Q

How do you separate a soluble solid from a liquid?

A

Evaporation or crystallisation.

28
Q

What is the shell in an atom?

A

They are the rings around the nucleus of an atom where the electrons are.

29
Q

What is the nucleus of an atom?

A

It is the centre of the atoms where protons and neutrons are.

30
Q

What is the atomic number of an element?

A

It is the number which denotes the amount of protons and electrons that are in an atom/ element.

31
Q

What is the mass number of an element?

A

The relative combined mass of the protons and neutrons.

32
Q

What is the charge and relative mass of a proton?

A

Its charge is +1 and it has a relative mass of 1.

33
Q

What is the charge and relative mass of a neutron?

A

Its charge is 0 and it has a relative mass of 1.

34
Q

What is the charge and relative mass of an electron?

A

its charge is -1 and it has a relative mass of ~0 or 0.000054.

35
Q

What is an isotope?

A

An atom with the same number of protons but a different number of neutrons, different mass number same atomic number.

36
Q

What is the relative mass?

A

It’s the weighted average of the mass of all the natural occuring isotopes with an element.

Chemistry (1 decks)

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