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Chemistry > The Great Periodic Table of Elements > Flashcards

The Great Periodic Table of Elements Flashcards

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1
Q

What is a Periodic Table?

A

a table where all the elements are arranged in an order of atomic number

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2
Q

Explain the features of Dmitri Mendeleev Periodic Table

A

1) Left Gaps for undiscovered elements
2)arranged is atomic mass
3) No Noble Gases
4)No Transition metals

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3
Q

Explain the features of Modern periodic Table

A

1) Noble Gases present
2) No Gaps
3) Arranged in atomic number
4)Transition metals present

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4
Q

What is a Period?

A

an horizontal row

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5
Q

What is a Group?

A

Vertical Column

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6
Q

What are Group 1 elements called?

A

Alkali Metals
(Reactive)

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7
Q

What are Group 2 elements called

A

Alkaline Earth Metals
(Reactive)

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8
Q

What are Group 7 elements called?

A

Halogens
(Reactive)

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9
Q

What are Group 0/8 elements called?

A

Noble Gases
(Non-Reactive)

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10
Q

What is the relation between elements and its group number?

A

Group Number is the same number of electrons in the outer shell

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11
Q

Why are alkali metals stored under oil

A

To prevent them from reacting with air or water vapor

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12
Q

Properties of Alkali metals

A

Soft
Less dense
Low melting points
Very Reactive

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13
Q

Explain the Reactivity of Group 1 Metals

A

The Reactivity Increases down the group

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14
Q

Reaction of Group 1 Metal with Water

A

Group 1 Metal + Water–> Metal Hydroxide + Hydrogen

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15
Q

What is an element

A

An element is a substance which consist of only one type of atom and cannot be broken down into anything simpler by chemical means

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16
Q

Properties of Metals

A

Malleable
Ductile
Sonorous
High Melting Point
Good Conductor of heat and electricity

17
Q

Properties of Group 1 Metals

A

Low Density(Li,Na and K are less dense than water)
Highly reactive and stored under oil to prevent reacting with air
dull in appearance but show a shiny surface when freshly cut
react vigorously with water

18
Q

What happens to reactivity of Group 1 Metal

A

Reactivity increases down the group

19
Q

Reaction of Group 1 metal with Oxygen

A

Metal oxide

20
Q

General Observations for Lithium Sodium and Potassium reacting with water

A

Fizzes
metal moves
heat is released
a colorless solution is formed
metal disappears
forms a silvery ball(sodium and potassium)
lilac flame/explosion(potassium)

21
Q

Safety Precautions when Reacting Group1 metal with water

A

Remove metal using tongs
only cut small piece
Remove oil and add metal to a large volume of water behind safety screen

22
Q

Properties of Group 7 Elements

A

Diatomic and Toxic

23
Q

What are halogens

A

Group of reactive and toxic non-metals

24
Q

State of fluorine in room temperature

A

Gas

25
Q

State of Chlorine in Room Temperature

A

Gas

26
Q

State of bromine

A

liquid

27
Q

State of Iodine

A

Solid

28
Q

Color of Fluorine

A

Yellow

29
Q

Color of Chorine

A

Yellow-green

30
Q

Color of Bromine

A

Red brown

31
Q

Color of Iodine

A

Grey-black

32
Q

What does iodine do when heated

A

Sublimes(changes from solid to gas)
Changes from grey black solid to purple gas

33
Q

What happens to the reactivity of halogens

A

Decreases
down the group

34
Q

What are noble gases?

A

Unreactive non-metals

35
Q

Why are the noble gases unreactive

A

have a full outer shell of electrons

36
Q

Properties of Noble Gases

A

colorless gases at room temperature
exist as individual atoms

37
Q

What happens to the boiling points of noble gases?

A

Increase down the group

38
Q

Properties of Transition Metals

A

Higher Melting Points
Higher Density
Less reactive with water

Chemistry (6 decks)

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