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Science > Elements,atoms and compound Mixtures > Flashcards

Elements,atoms and compound Mixtures Flashcards

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1
Q

All elements of the periodic table have…

A

Atoms

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2
Q

An element is made up of..

A

One atom only

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3
Q

How are elements made?

A

Nuclear reactions

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4
Q

Protons mass

A

1

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5
Q

Neutron mass

A

1

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6
Q

Electron mass

A

Almost 0

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7
Q

Protons charge

A

+1

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8
Q

Neutron charge

A

0

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9
Q

Election charge

A

-1

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10
Q

Atoms are made up of what

A

Protons
Neutrons
Electrons

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11
Q

The first shell of an atom contains how many electrons

A

2 electrons

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12
Q

The second shell of an atom contains how many electrons

A

8 electrons

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13
Q

The third shell of an atom contains how many electrons

A

8 electrons

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14
Q

Where is the nucleus located in an atom?

A

Middle of the atom covered by the shells

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15
Q

What is an isotope

A

An atom that has different number of neutrons from the majority of the atom

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16
Q

Mono meaning

A

One

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17
Q

Di meaning

A

Two

18
Q

Tri meaning

A

Three

19
Q

-ide meaning

A

Non metal

20
Q

-ate meaning

A

Non metal + oxygen

21
Q

Diatomic meaning

A

Two atoms

22
Q

12 - name
C
Carbon
6

A

Protons & neutrons in the atom

23
Q

12
C - name
Carbon
6

A

Atomic symbol

24
Q

12
C
Carbon - name
6

A

Atomic name

25
Q

12
C
Carbon
6 - name

A

Elections

26
Q

How to find the amount of neutrons in an atom

A

Mass number - proton number

27
Q

Group 1 metals are known as

A

Alkali metals

28
Q

Group 7 metals also known as

A

Halogens s

29
Q

Group 7 are

A

Very reactive

30
Q

How many electrons do group 7 have in there outer shell

A

7

31
Q

Are transition metals less or more reactive and why

A

Less because they corrode slowly

32
Q

Corrode meaning

A

Destroy / damage

33
Q

What is an element

A

A substance that cannot be broken down into anything simpler

34
Q

What is a Mixture

A

Two or more substances that are mixed together
- not chemically bonded
-in fixed proportions

35
Q

Compound meaning

A

Consists of two or more elements chemically combined

36
Q

“ atoms are tiny solid spheres”

A

Jhon dalton 1803

37
Q

“ atoms contain negatively charged particles called electrons”

A

JJ Thomson 1897

38
Q

“ atoms have a nucleus which is positively charged”

A

Ernest Rutherford 1911

39
Q

“ electrons are in energy shells around the nucleus”

A

Niels Bohr 1922

40
Q

What is potable water

A

Water that is safe to drink

41
Q

Sludge is

A

Human waste

Science (2 decks)

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