atomic structure and the periodic table Flashcards Preview

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Flashcards in atomic structure and the periodic table Deck (12)
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1
Q

what does soluble mean?

A

it can be dissolved in water

2
Q

what is a solvent?

A

a solution able to absorb another

3
Q

what does abundance mean?

A

a lot of

4
Q

what is the purpose of filtration?

A

to separate an insoluble solid from a solution

5
Q

what is the purpose of distillation?

A

to separate a solvent from a solution

6
Q

what is the purpose of fractional distillation?

A

to separate substances with varying boiling points

7
Q

what is the purpose of crystallisation?

A

to separate a soluble solid from a solution

8
Q

what is the purpose of chromatography?

A

to separate soluble coloured compounds

9
Q

what was the plum pudding model and who devised it?

A

j. j thompson - it was a mode of the atom
- the mass and positive charge was evenly distributed
- with negative charge embedded like plums in a plum pudding

10
Q

what was the nuclear model and who devised it?

A

rutherford - it was a model of the atom

  • the mass and charge was concentrated in a very small, dense nucleus in the centre
  • most of the atom was empty space
11
Q

how did the results of the gold foil experiment dictate the nuclear model?

A

most of the alpha particles went straight through - most of the atom is mostly empty space

some of the particles were deflected at large angles - the mass is concentrated in the centre in a positively charged nucleus ( because positive charges repel )

very few came straight back - the mass is concentrated in a very small space in the centre of the atom ( because the chance of hitting it was very small )

12
Q

what is the relative mass of an electron?

A

1/2000