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Science 8 (22-23) > ➕ Chemistry - Periodic Table > Flashcards

➕ Chemistry - Periodic Table Flashcards

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1
Q

gives the number of valence electrons for a neutral atom

A

group

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2
Q

gives the number of energy shells for a neutral atom

A

period

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3
Q

an element that has some properties of both metals and nonmetals

A

metalloids

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4
Q

nitrogen, oxygen, and carbon are essential to life and are what type of elements (metals or nonmetals?)

A

nonmetals

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5
Q

Where are metals found in the periodic table?

A

To the left of the stepped line.

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6
Q

Where are non metals found in the periodic table?

A

To the right of the stepped line.

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7
Q

What are the physical properties of a typical metal?

A

Good conductor of electricity
Good conductor of heat
Shiny
High density
Malleable
Ductile
Sonorous

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8
Q

What is meant by high density?

A

Heavy for its size

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9
Q

What is meant by malleable?

A

Something can be hammered into a shape

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10
Q

What is meant by ductile?

A

Something that can be stretched into a wire

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11
Q

What is meant by sonorous?

A

Something that makes a ringing sound when hit

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12
Q

What are the properties of a typical non-metal?

A

Poor conductor of electricity
Poor conductor of heat
Dull
Low density
Brittle
Not sonorous

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13
Q

What is meant by brittle?

A

Breaks easily

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14
Q

What is meant by low density?

A

light for its size

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15
Q

Which state are all metals apart from 1?

A

Solid (mercury is liquid)

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16
Q

What do we call elements that are near the stepped line on the periodic table?

A

Metalloids

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17
Q

Compare the melting points of metals and non metals.

A

Most metals have high melingl points
Most non metals have low melting points

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18
Q

What is meant by ‘chemical properties’ of an element?

A

How well it reacts with other elements

19
Q

What do we call columns of the periodic table?

A

Groups

20
Q

What do we call rows of the periodic table?

A

Periods

21
Q

When we look down a group or across a period there are _______ in properties such as melting point, boiling point and density.

A

patterns

22
Q

By looking at patterns down a group or across a period of the periodic table we can make ________ about unknown elements in that group

A

predictions

23
Q

What are the group1 elements also known as?

A

The alkali metals

24
Q

Name the group 1 elements

A

Lithium
Sodium
Potassium
Rubidium
Cesium
Francium

25
Q

Describe the chemical properties of the group 1 elements.

A

They are reactive metals

26
Q

Describe the physical properties of the group 1 elements

A

Good conductors of heat/electricity
Shiny when cut

27
Q

What happens to the melting/boiling point of the group 1 metals as you move down the group?

A

It decreases

28
Q

What happens to the reactivity of the group 1 elements as you move down the group?

A

They become more reactive

29
Q

By what name are the elements of group 7 sometimes called?

A

The halogens

30
Q

Name all of the elements of group 7

A

Fluorine
Chlorine
Bromine
Iodine
Astatine

31
Q

Give some of the physical properties of the group 7 elements.

A

Non metals so:
Low melting/boiling points
Do not conduct electricity
Iodine is brittle

32
Q

What happens to the melting point of the group 7 elements as you move down the group?

A

It increases

33
Q

What happens to the color of the group 7 elements as you move down the group?

A

They get darker

34
Q

What happens to the reactivity of the group 7 elements as you move down the group?

A

The elements become less reactive as you move down the group

35
Q

By what other name are the group 8 elements known?

A

The noble gases

36
Q

Identify the noble gases

A

Helium
Neon
Argon
Krypton
Xenon
Radon

37
Q

What is the state of the group 8 elements?

A

Colorless gases

38
Q

The melting/boiling points of the group 8 elements are very ____

A

low

39
Q

What happens when you pass an electric current through the group 8 elements?

A

They glow brightly

40
Q

Neon gas is used in…

A

fluorescent signs

41
Q

Helium gas is used in…

A

balloons

42
Q

Which group 8 element has a lower density than air?

A

helium

43
Q

The group 8 elements are extremely unreactive so we say that they are…

A

stable

44
Q

Although they are unreactive, reactivity increases as you move _____ the group 8 elements.

A

down

Science 8 (22-23) (11 decks)

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