atomic structures Flashcards

1
Q

define ‘atom’

A

the smallest part of any substance

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2
Q

name the 3 sub-atomic particles

A

proton, neutron and electron

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3
Q

relative charge, mass and location of protons

A

relative charge: +1, relative mass: 1, location: nucleus

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4
Q

relative charge, mass and location of neutrons

A

relative charge: 0/no charge, relative mass: 1, location: nucleus

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5
Q

relative charge, mass and location of electrons

A

relative charge: -1, relative mass, almost 0 (0.0005), location: in shells

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6
Q

why are atoms neutral/have no overall charge?

A

if protons and electrons are equal, they cancel eachother out

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7
Q

define ‘mass number’

A

total number of protons and neutrons in the nucleus

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8
Q

define ‘atomic number’

A

the number of protons in each atom of an element

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9
Q

number of _____ = number of ______

A

number of electrons = number of protons

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10
Q

define ‘ion’

A

particles which have lost or gained electrons meaning that the particle will now have a positive or negative charge

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11
Q

neutron equation?

A

mass number - atomic number

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12
Q

atomic numbers are equal to (sub-atomic particle) and (sub-atomic particle)

A

protons and electrons

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