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C2 > Basics > Flashcards

Basics Flashcards

0
Q

Crucial parts of mendeleevs design

A

Left gaps

Arranged in rows with similar properties

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1
Q

Creator of periodic table

A

Dimitri Mendeleev

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2
Q

Mendeleevs prediction

A

Gallium (eka- aluminium) estimated properties based on gaps

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3
Q

Relative mass of an electron

A

1/1840

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4
Q

Number above element and what it means

A

Mass number .protons + neutrons

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5
Q

Number below element and what it means

A

Atomic number , number of protons

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6
Q

Isotope definition

A

Same atom, different number of neutrons

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7
Q

Ion definition

A

Atom or group of atoms with a positive or negative charge

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8
Q

In which groups is the ionic charge linked to the group number

A

1 and 2

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9
Q

-ide

A

When non metal atoms form ions

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10
Q

Ionic bonds

A

Between negatively non metals and positively charged metals

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11
Q

Ionic compounds are always

A

Electrically neutral

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12
Q

Charge and symbol of ammonium

A

[Nh4]+

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13
Q

Charge and symbol of sulfate

A

(So4)2-

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14
Q

Charge and symbol of carbonate

A

(Co3)2-

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15
Q

Charge and symbol of oxide

A

(O)2-

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16
Q

Charge and symbol of nitrate

A

(No3)-

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17
Q

Charge and symbol of hydroxide

A

(Oh)-

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18
Q

-ate

A

Shows presence of oxygen

19
Q

Ionic compound arrangement

A

Lattice structure

20
Q

Significance of ionic bonds

A

Strong electrostatic forces from oppositely charged atoms

21
Q

Conditions required for conductivity

A

Must contain charged particles that are free to move

22
Q

Ionic substance conductivity

A

They are charged but held in the lattice, they can only move when aqueous or molten

23
Q

Typical melting boiling points of ionic compounds

A

High due to lattice and strong electrostatic forces

24
Q

Definition of salt

A

Product of acid and alkali

25
Q

A reaction from which an insoluble solid is produced from 2 soluble substances

A

Precipitation

26
Q

Separating a salt

A

Filtration followed by washing and drying

27
Q

All nitrates are

A

Soluble

28
Q

Most carbonates are

A

Insoluble (except sodium,potassium and ammonium)

29
Q

Most hydroxides are

A

Insoluble (except na, k and ammonium)

30
Q

Barium meals

A

Barium sulfate ingested and x ray taken , most other barium salts are toxic,

31
Q

Why is barium sulfate ok to eat

A

It’s insoluble so it doesn’t enter the blood

32
Q

Sodium flame colour

A

Yellow

33
Q

Potassium flame colour

A

Lilac

34
Q

Calcium flame colour

A

Red

35
Q

Copper flame colour

A

Green-blue

36
Q

Test for chloride ions

A

Precipitation test, drops of dilute nitric acid added, shaken. Drops of silver nitrate added, white precipitate of silver chloride formed

37
Q

Test for sulfate ions

A

Drops of dilute HCL added, shaken. Barium chloride added, white precipitate barium sulfate forms.

38
Q

Carbonate test

A

Limewater turns cloudy when co2 is bubbled through

39
Q

Non metal to non metal bond

A

Covalent bond

40
Q

Properties of simple covalent substances

A

Low melting
Low boiling
Weak forces between molecules

41
Q

Properties of giant molecular covalent substances

A

High melting/boiling

Strong bonds

42
Q

Differences and similarities between diamond and graphite

A

Similarly high boiling/melting
Graphite soft diamond hard
diamond doesn’t conduct because no free e
Graphite conducts because one free e each

43
Q

Immiscible

A

Can’t mix permanently

44
Q

How to separate Immiscible liquids

A

Separating funnel, denser liquid bottom leaves first

45
Q

Rf value

A

Solubility, distance moved by compound/distance moved by solvent

46
Q

Uses of chromotography

A

Detecting fakes, forensics, food colouring id,

C2 (4 decks)

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