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studying > sci 9 chap 1 > Flashcards

sci 9 chap 1 Flashcards

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1
Q

who suggested that matter is made of atoms

A

dalton

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2
Q

who proposed that atoms contain electrons?

A

thomson

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3
Q

what are negatively charged particles called

A

electrons

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4
Q

what are positively charged particles called

A

protons

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5
Q

what are particles with no charge called

A

neutrons

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6
Q

who discovered the nucleus and its subatomic particles

A

rutherford

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7
Q

who said that the nucleus was made up of protons and neutrons

A

rutherford

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8
Q

who said that electrons were located in shells around the nucleus

A

bohr

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9
Q

what do electrons have that allow them to jump back and fourth between _____ levels

A

energy

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10
Q

all atoms are made up of?

A

subatomic particles; protons, neutrons, electrons

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11
Q

protons have what charge

A

positive

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12
Q

electrons have what charge

A

negative

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13
Q

neutrons have what charge

A

no electric charge

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14
Q

what two subatomic particles clump together to form the nucleus

A

protons and neutrons

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15
Q

who said that atoms cannot be created, destroyed, or divided into smaller particles

A

dalton

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16
Q

who said that electrons occupy specific energy levels or shells

A

bohr

17
Q

who said that most of the mass of the atom is in the tiny, dense, positively charged nucleus

A

rutherford

18
Q

who said that most of the atom is empty space

A

rutherford

19
Q

who said that all matter is made out of small particles called atoms

A

dalton

20
Q

who said that all atoms of the same element are identical

A

dalton

21
Q

who said that atoms contain negatively charged particles

A

thomson

22
Q

who said that the nucleus contains protons and neutrons

A

rutherford

23
Q

who said that different elements combine together to form compounds

A

dalton

24
Q

who said that electrons move around a central nucleus

A

bohr

25
Q

who discovered the nucleus

A

rutherford

26
Q

who said that all matter is made of atoms

A

dalton

27
Q

who proposed the raisin bun atom model

A

thomson

28
Q

who observed streams of electrons in gas discharged tubes

A

thomson

29
Q

who proposed that electrons exist in energy levels

A

bohr

30
Q

solid to liquid

A

melting

31
Q

liquid to gas

A

vaporization

32
Q

gas to solid

A

deposition

33
Q

solid to gas

A

sublimation

34
Q

gas to liquid

A

condensation

35
Q

liquid to solid

A

solidification

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