The Atom Flashcards

1
Q

John Dalton

A

Solid Spheres made up of different elements.

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2
Q

JJ Thompson

A

Atoms must contain smaller negatively charged particles-electrons. The plum pudding model

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3
Q

Ernest Rutherford

A

gold foil experiment-podstivly charged nucleus surrounded by a cloud of electrons. most of the atom is empty space

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4
Q

Relative mass and charge of a proton

A

1 +1

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5
Q

Relative mass and charge of a neutron

A

1 0

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6
Q

Relative mass and charge of a electron

A

0.0005 -1

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7
Q

What is an isotope

A

different forms of the same element. different number of neutrons

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8
Q

Relative Atomic Mass

A

sum of (isotope abundance x isotope mass number) sum of abundance of all the isotopes

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9
Q

electron configuration

A

2.8.8.18

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10
Q

negative ion

A

anions

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11
Q

positive ion

A

cation

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12
Q

properties of simple molecular substances

A

low melting and boiling points
gases or liquids at room temperature
don’t conduct electricity

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13
Q

properties of giant covalent structures

A

hight melting and boiling points
don’t conduct electricity
aren’t soluble in water

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14
Q

what giant covalent structures conduct electricity

A

graphite and graphene

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