chapitre 4 et 5 Flashcards

1
Q

comment est un atome électriquement parlant ?

A

électriquement neutre

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2
Q

une molécule

A

entité chimique d’au moins 2 atomes

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3
Q

ion de charge négative

A

anion

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4
Q

ion de charge positive

A

cation

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5
Q

masse d’un électron

A

9,1 x 10[-31] kg

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6
Q

électron

A

charge négative

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7
Q

proton

A

charge positive

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8
Q

neutron

A

sans charge électrique

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9
Q

nucléons

A

protons + neutrons

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10
Q

que signifie X

A

c’est le symbole chimique

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11
Q

que signifie Z

A

c’est le nombre de protons

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12
Q

que signifie A

A

c’est le nombre de nucléons

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13
Q

formule pour calculer le nombre de neutrons dans le noyau

A

A - Z

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14
Q

noyaux isotopes

A

noyau ayant le même nombre de protons mais un nombre de nucléons différents

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15
Q

taille d’un atome

A

10[-10]m

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16
Q

taille d’un noyau

A

environ 100000 fois plus petit que l’atome

17
Q

atome est essentiellement constitué de

A

vide