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Mixtures elements compound > Elements > Flashcards

Elements Flashcards

1
Q

3 states of matter

A

Liquid, gas, solid

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2
Q

Does Solids, liquids and gases have different physical properties

A

Yes

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3
Q

What shape does solid have

A

Fixed shape

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4
Q

What elements cannot be compressed

A

solids and liquids

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5
Q

What elements diffuse

A

liquid and gas

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6
Q

What is matter made of

A

Atoms

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7
Q

What are elements

A

substances that consist of only one type of atom chemically combined

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8
Q

How are elements described

A

Symbols and formulas such as O2 for oxygen N2 Nitrogen

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9
Q

What is a compound

A

substances that consist of more than one type of atom chemically combined

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10
Q

How are compounds described

A

symbols and formula e.g. H2O for water, CO2 for carbon dioxide

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11
Q

What is a mixture

A

2 or more substances in the same volume that are not chemically combined

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12
Q

Physical changes reversing

A

Physical changes do not result in the formation of new substances and are easy to reverse

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13
Q

What are the physical changes

A

Mixture formation, dissolving, diffusion, changes of state, melting

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14
Q

Chemical changes reversing

A

Chemical changes do result in the formation of new substances and are difficult to reverse

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15
Q

What are chemical changes

A

cooking, burning, metals added to acid, decomposing

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16
Q

What happens when a chemical change occurs

A

When a chemical change occurs a chemical reaction takes place

17
Q

What are substances that take part in chemical reactions called

A

reactents

18
Q

Substances that take part in chemical reactions are called reactants; the new substances are called

A

products

19
Q

What useful products are produced through chemical reactions

A

Metals, foods, clothing, building materials

20
Q

signs of chemical change

A

Odur, bubbles, new substances

20
Q

signs of chemical change

A

Odur, bubbles, new substances

21
Q

why do bike tires seem flatter when cold

A

because particles when hot move around more and more reactions,

22
Q

Boiling point on graph

A

100c

23
Q

Melting point on graph

A

0c

24
Q

electrons electricity

A

negative

25
Q

neutrons electricity

A

neutral

26
Q

proton electricity

A

positive

27
Q

how do electrons orbit

A

electrons can only orbit at set distance from the nucleus

28
Q

electron shell

A

1 ring- 2 electrons
2nd ring - 8 electrons
3rd ring- 8 electrons

29
Q

IDE ending

A

Metal + non metal = metal non metal ide

eg sodium + chlorine = sodium chloride

30
Q

ATE ending

A

Metal + non metal + oxegyn

eg sodium + chlorine + oxegyn = sodium chlorate

31
Q

Identify number of molecules in chemical formula
eg 5C4H10

A

5

32
Q

Identify number of elements in chemical formula
eg 3CaSO4

A

3

33
Q

Identify number of ATOMS in chemical formula
eg 4K2CrO4

A

7X4 =28

Mixtures elements compound (1 decks)

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