Exam 1 Flashcards

1
Q

Qu’est-ce qu’un élément chimique?

A

Substance pure formée d’une seule sorte d’atomes.

Ex: H O Cl

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2
Q

Qu’est-ce qu’un composé?

A

Substance dont l’unité de base est constituée de plus d’un élément chimique

Ex: HCl (H et Cl sont 2 éléments différents

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3
Q

H?

A

Hydrogène

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4
Q

C?

A

Carbone

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5
Q

O?

A

Oxygène

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6
Q

N?

A

Azote

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7
Q

Na?

A

Sodium

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8
Q

K?

A

Potassium

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9
Q

Hg?

A

Mercure

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10
Q

Cl?

A

Chlore

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11
Q

Mg?

A

Magnésium

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12
Q

S?

A

Soufre

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13
Q

Qu’elle est la formule chimique de l’eau?

A

H2O

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14
Q

Le test de l’identification de l’hydrogène?

A

Le test de la flamme

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15
Q

Le test de l’identification de l’oxygène?

A

Le test du tison

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16
Q

Le test de l’identification du gaz carbonique?

A

L’eau de chaux

17
Q

Qu’est-ce qu’un molécule?

A

Ensemble de plusieurs atomes, de même sorte ou de sortes différentes, attachés ensemble par des liaisons chimiques.

18
Q

Qu’est-ce que des indices?

A

Désigne le nombre d’atome