Atoms and elements Flashcards

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1
Q

This model resulted from the gold foil experiment

A

Rutherford

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2
Q

This model was the first to explain why atoms emit light of a particular colour when exposed to an electromagnetic field

A

Rutherford-Bohr

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3
Q

This model could not explain why atoms could gain or lose electrons and become ions

A

Dalton

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4
Q

Dalton though that all atoms of the same element were identical. This model demonstrates that they are not, because their masses can be different

A

Simplified. Atomic. Model

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5
Q

(From gold foil experiment)
When some (very few) alpha particles bounced back, what is the conclusion…

A

The atoms nucleus is small and dense

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6
Q

(From gold foil experiment)
when most of the particles pass through, what is the conclusion..

A

The atom is mostly empty space

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7
Q

(From gold foil experiment)
When the atom has a positively charged nucleus, what is the observation…

A

some particles were slightly deflected

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8
Q

Periodic trend for electronegetivity

A

…➡

up then right

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9
Q

periodic trend for MP,BP and Density

A

➡⬅
closest in the middle

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10
Q

periodic trend for Atomic Radius

A

….⬅

left then down

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11
Q

periodic trend for ionization energy

A

…➡

up then right

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12
Q

periodic trend for reactivity

A

Metals:.
…⬅

left then down

Non-metals:
…➡

up then right

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13
Q

Largest element

A

Fr, Francium

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14
Q

Smallest element

A

He, Helium

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15
Q

Which element has three isotopes

A

H, Hydrogen

Protium, Deuterium and Tritium

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16
Q

Name the family that is soft/light and reacts violently with water

A

Alkaline metals (1 VE)

17
Q

properties of halogens

A

Multicoloured and multistate, highly reactive, toxic and corrosive (7 VE)

18
Q

name the family that is non-reactive, colourless and oderless

A

Inert gases (8 VE)

19
Q

properties of alkaline earth metals

A

hard, burns easily (2 VE)

20
Q

Properties of Metalloids
tip: staircase

A

Mix of properties from metals and non-metals
EX. Dull but has lustre
acidic but low density

21
Q

which model is made of tiny indivisible particles called atoms

A

daltons model

22
Q

what model used cathod rays

A

thomsons model

23
Q

why was Rutherfords model bad

A

because it didn’t explain how electrons held their position around the nucleus w/o crashing.. since opposite charges attract