The Great Periodic Table of Elements Flashcards

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

25
State of Chlorine in Room Temperature
Gas
26
State of bromine
liquid
27
State of Iodine
Solid
28
Color of Fluorine
Yellow
29
Color of Chorine
Yellow-green
30
Color of Bromine
Red brown
31
Color of Iodine
Grey-black
32
What does iodine do when heated
Sublimes(changes from solid to gas) Changes from grey black solid to purple gas
33
What happens to the reactivity of halogens
Decreases down the group
34
What are noble gases?
Unreactive non-metals
35
Why are the noble gases unreactive
have a full outer shell of electrons
36
Properties of Noble Gases
colorless gases at room temperature exist as individual atoms
37
What happens to the boiling points of noble gases?
Increase down the group
38
Properties of Transition Metals
Higher Melting Points Higher Density Less reactive with water