Assinale a alternativa incorreta. *
Matéria é tudo o que tem massa e ocupa volume.
...
Assinale a alternativa incorreta. *
Matéria é tudo o que tem massa e ocupa volume.
Massa e peso são grandezas distintas. A massa é uma medida de quanto de matéria possui um objeto, e o peso é uma medida da força de atração gravitacional sofrida pelo objeto.
O modelo atômico de Dalton tem semelhanças ao modelo atômico descrito poe Leucipo e Demócrito.
Dalton achava que átomos de mesmo elemento não podiam se combinar, pois desenvolviam repulsão mútua.
No modelo atômico de de Leucipo e Demócrito, os elétrons possuíam cargas negativas.
Answers: 3
Chemistry, 21.06.2019 23:40
If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?
Answers: 2
Chemistry, 22.06.2019 21:00
The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?
Answers: 1
Chemistry, 22.06.2019 23:00
Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?
Answers: 3
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