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chemistry GCSE huseyn > CC5-CC7 > Flashcards

CC5-CC7 Flashcards

1
Q

what is a bond

A

an attraction between two atoms that hold together

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2
Q

what is an ion

A

an atom that has gained a charge by gaining or losing electrons

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3
Q

what is a charge

A

whether an ion is positive or negative

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4
Q

what is a cation

A

positive ion formed by losing electrons, formed by metal atoms

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5
Q

what is an Anion

A

negative ion formed by gaining electron. formed by non-metal atoms

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6
Q

what is an electrostatic force

A

A force of attraction between a positive and negative particle

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7
Q

what is an ionic compound

A

when two oppositely charged ions are held together by and electrostatic force an ionic lattice

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8
Q

what is a ionic Latice

A

a repeating 3D pattern of alternating positive and negative ions

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9
Q

What is a ionic compound formed with

A

A metal and non metal

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10
Q

What is a covalent bond formed with

A

Non metals only

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11
Q

How does a covalent bond work

A

Two non metals share electrons to make a stable substance dot and cross

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12
Q

What is a molecule

A

A distinct group of atoms bonded by covalent bonds

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13
Q

What is the structure of molecules

A

Simple molecular structure
Water molecule
Air

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14
Q

Are molecules bonded to each other

A

No bec they have a simple molecular structure

Only atoms are covalently bonded

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15
Q

Where do intermolecular forces

A

Between molecules

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16
Q

Where do covalent bonds exist

A

Between atoms

17
Q

How do you calculate the number of protons neutrons and electrons in an atom

A 
Protons= atomic number
Electrons= atomic number
Neutrons= mass–atomic
18
Q

Where is the atomic number and mass number

A 
Atomic = top
Mass = bottom
19
Q

What does -ide mean in elements

What does -ate mean

A

If it contains just two elements

If it contains three or more elements

20
Q

What is the charge on ionic compounds and why

A

In an ionic compound the charges have to cancel out to leave an overall charge of 0

21
Q

Describe the structure of ionic compounds

A

The ions have a regular repeating arrangement of cations and anions called an ionic lattice

22
Q

Why can ionic compounds conduct electricity when they are molten in aqueous solution

A

The ions are free to move

23
Q

Where does ionic bonding take place and how

A

When a metal atom reacts with a non metal atom

The outer electrons are transferred from the metal atom to the non metal atom

24
Q

Explain how covalent bonds form

A

When two non metals atoms share a pair of electrons

25
Q

Name some common molecular elements

A

Hydrogen
Nitrogen
Oxygen

26
Q

What bonding happens in molecules

A

Covalent bonding

27
Q

Name the properties of simple molecular and covalent substances

A

Low melting and boiling point

Don’t conduct electricity because no free electrons and an overall charge

28
Q

Describe the structure of polymer

A
  • They are joined together by strong covalent bonds in long chains
  • Very large molecules
  • Intermolecular force
29
Q

Names some allotropes of carbon

A

Diamond
Graphite
Fullerenes

30
Q

Properties of a giant covalent structure

A

High melting point

31
Q

How is graphite formed

A

Formed by layered of carbon atoms in hexagonal rings

Each carbon atom has a delocalised electron electricity and heat conductor

32
Q

Graphene properties and structure

A

One layer of graphite
Electricity conductor
Extremely strong

33
Q

What are fullerenes

A

They are molecules of carbon atoms with hollow shapes

Usually have have hexagonal rings of carbon atoms but can have 5 or 7

34
Q

Uses of fullerenes

A

Lubricants
Drugs
Catalysts

35
Q

What are carbon nano tubes

A

Fullerenes shaped into long cylinders
High tensile strength
Heat and electricity conductors

chemistry GCSE huseyn (3 decks)

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