Answer is: 2) A positively charged nucleus is surrounded by mostly empty space.
Rutherford theorized that atoms have their charge concentrated in a very small nucleus.
This was famous Rutherford's Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles (helium atom particles, consist of two protons and two neutrons).
Rutherford observed the deflection of alpha particles on the photographic film and notice that most of alpha particles passed straight through foil.
That is different from Plum Pudding model, because it shows that most of the atom is empty space.
The conclusion about the structure of the atom as the result of the gold foil experiment is that a positively charged nucleus is surrounded by mostly empty space. The answer is number 2. Also, he concluded that an atom was not an empty space but rather, the electrons are scattered.
Long story short, C is the answer.
The Arrhenius theory established that acids and some bases: dissociate giving rise to ions.
Arrhenius's theory was a theory of acids and bases formulated on the basis of his theory of ionization of substances in aqueous solutions.
Therefore, we can conclude that the Arrhenius theory explains that the characteristic properties of aqueous solutions of acids are due to hydrogen ions.
Learn more about the Arrhenius theory here: brainly.com/question/3920636
Answer:
According to the theory, an Arrhenius acid is a substance that gives hydrogen ion, (or protons) as the only positively charged ions, when dissociated in water.
Explanation:
What this means is that acids increase the concentration of protons in water to form hydronium ions,as opposed to the idea that there aren't free hydrogen cations floating around in aqueous solution.
The Arrhenius definitions of acidity and alkalinity are restricted to aqueous solutions and refer to the concentration of dissolved ions.
atm. What is the partial pressure (atm) of argon?
Answer:
Increasing
Explanation:
Answer: the canola oil.
Explanation:
According to the melting points reported, at 5°C canola oil, whose melting point is 10°C, will freeze (become solid), while the other three, corn oil, sunflower oil, and peanut oil, having melting points several degrees below 5°C, will remain in liquid state.
Therefore, by decantation or filtration, which are processes that permit separate solids from liquids in a mixture, you can separate easily the solid canola oil from the other three liquid oils.
After separating the canola oil, If you continue cooling the mixture and reach a temperature of - 5°C. the peanut oil, whose melting point is -2°C, whill freeze and you will be able to separate it (again by decantation or filtration).
The same operation, cooling a third time until a temperature around 12°C, will permit you to separate the remaining two oils.
As you see, the knowledge of the physical properties of the substances is a useful tool to separate mixtures.