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zheka24 [161]
3 years ago
13

Sort these six events from the earliest to the most recent. 1. Democritus proposes the existence of atoms 3rd 2. Dalton's atomic

theory 2nd 3. J. J. Thomson discovers the electron 1st 4. Rutherford's gold foil experiment 6th 5. Bohr model 4th 6. Schrödinger's Wave Mechanics model of the atom 5th
Chemistry
1 answer:
Nitella [24]3 years ago
4 0

Explanation:

1. Democritus proposes the existence of atoms

2. Dalton's atomic theory

3. J. J. Thomson discovers the electron

4. Rutherford's gold foil experiment

5. Bohr model

6. Schrödinger's Wave Mechanics model of the atom

The first idea about matter containing atoms dates back to Greek philosophers. One of them was Democritus .

In 1808 Dalton put forward his atomic theory

In 1897 J.J Thomson discovered cathode rays using his gas discharge tube experiment.

In 1911, Ernest Rutherford proposed the nuclear model of the atom using experiments on the gold foil.

Neils Bohr in 1913 suggested his own atomic model

Erwin Schrodinger formulated the wave equation of electrons

Learn more;

Dalton atomic theory brainly.com/question/1979129

Rutherford gold foil experiment brainly.com/question/1859083

#learnwithBrainly

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Oxygen gas produced : 0.7 g

<h3>Further explanation</h3>

Given

10.0 grams HgO

9.3 grams Hg

Required

Oxygen gas produced

Solution

Reaction⇒Decomposition

2HgO(s)⇒2Hg(l)+O₂(g)

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

mass of reactants = mass of products

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10 g = 9.3 g + mass O₂

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Explanation:

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Citrus2011 [14]

Answer:

Explanation:

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Questions that cannot have a definite answer are the field of religion or philosophy, and are out of the boundaries of science.

For example, does a criminal deserve the punishment of not seeing light? It is a moral question, which to be responded needs the intervention of philosophy and that could have different anwers at different times and in different societies.

 


3 0
3 years ago
If a solution has a pH of 2, what is the hydroxide ion concentration?
murzikaleks [220]

Answer:

A

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14=pH + pOH

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5 0
1 year ago
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