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Miss571
@Miss571
June 2021
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Comment d'écrire la composition d'un atomes ?
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Jujutitine
Un noyau et du vide... Dans le noyau: des nucléons( protons et neutrons) et dans le "vide"des électrons qui gravitent autour du noyau.
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Miss571
la question est : Latome d'oxygène possède 8 electrons. il peut former l'ion O^(2-). decris la composition de l,atome d'oxygène. "
Miss571
par rapport a cela on décris comment ?
ch23
Un atome contient un noyau
situé en son centre et des électrons
qui "tournent" autour du noyau.
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Miss571
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de l'aide svp, dire si c est vraie ou faux pour la question 66
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Miss571
June 2021 | 0 Respostas
Bonjours, quelqu'un peut aider svp .Il faudra expliquer si c'est vraie ou faux avec justification.. Si la proportion de A dans B est 1/4 et la proportion de B dans E est 1/4, alors la proportion de A dans E est 1/2.
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Miss571
June 2021 | 0 Respostas
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Miss571
June 2021 | 0 Respostas
Anglais forme passive. Vous pouvez m'aidez svp. A ) Identifiez les phrases qui sont au passif. 1) He was going to see a film. 2) The film had been showing for two months. 3) It was made in the USA. 4)It has been well received by the crictics. 5)He has been waiting in the queue for 20minutes. B) Mettre ces phrases a la forme passive. 1) Somebody has found the body of Lord Arthur in the lounge. 2) They called the police at 7. 3)they will arrest the murderer soon. 4) someone must have followed Lord Arthur on his way home. 5) they did not tell me the truth.
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Miss571
April 2019 | 0 Respostas
Correction svp. bonjours quelqu'un pourrait me corriger svp. A= (x-1)(x+1)+(x-1)^2 Developpez A) A=(x^2 +1x-1x)+[x^2-2*x*(-1)+1^2] A=x^2+1+(x^2-2x+1) A=2x^2 - 2x +2 Factoriser jai trouver A=(x-1)(2x+0)
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