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Chemistry > Chemicals & Observations > Flashcards

Chemicals & Observations Flashcards

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1
Q

What are the eight diatomic molecules ?

A

Hydrogen
Nitrogen
Oxygen
Fluorine
Chlorine
Bromine
Iodine
Astatine

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2
Q

What are the symbols for the eight diatomic molecules ?

A

Hydrogen - H2
Nitrogen - N2
Oxygen - O2
Fluorine - F2
Chlorine - Cl2
Bromine - Br2
Iodine - I2
Astatine - At2

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3
Q

Colours of Methyl Orange acid, neutral and alkaline ?

A

Acidic - Red
Neutral - Orange
Alkaline - Yellow

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4
Q

Colours of Phenolphthalein in acidic, neutral, alkaline ?

A

Acidic - colourless
Neutral - colourless
Alkaline - pink

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5
Q

Red Litmus indication colours ?

A

Acidic - red
Neutral - red
Alkaline - blue

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6
Q

Blue litmus indication colours

A

Acidic - red
Neutral - blue
Alkaline - blue

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7
Q

What is diffusion ?

A

Particles spreading from high concentration areas to low concentration areas

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8
Q

Pure substances and mixtures:

A

Pure substance - all particles are the same
Mixtures - contains different particles
Element - only one kind of atom
Compound - different atoms chemically bonded

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9
Q

Element + Oxygen = ?

A

Element oxide

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10
Q

Observation for magnesium + oxygen

A

Bright light and white solid formed

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11
Q

Observation for sulphur + oxygen

A

Blue flame

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12
Q

Observation for hydrogen + oxygen

A

Squeaky pop

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13
Q

Do metal oxides form alkali solutions ?

A

Yes

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14
Q

Do non-metal oxides form acidic solutions ?

A

Yes

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15
Q

Term solute ?

A

Substance going to be dissolved

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16
Q

Term solvent ?

A

Liquid which does the dissolving

17
Q

Term suspension ?

A

Solid which is floating as it cannot be dissolved anymore

18
Q

What is thermal decomposition ?

A

Using heat to break down a substance

19
Q

Relative mass for proton ?

A

1

20
Q

Relative mass for neutron ?

A

1

21
Q

Relative mass for electrons ?

A

0.0005

22
Q

What is the atomic number ?

A

The number of protons

23
Q

What is the mass number ?

A

Total number of protons and neutrons

24
Q

What is an isotope ?

A

Atoms with the same number of protons but different dumber of neutrons

Chemistry (4 decks)

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