as a result of the gold foil experiment it was concluded that an atom (1) contains protons, neutrons, and electrons(2)contains a small, dense nucleus(3)has positrons and orbitals (4)is a hard and invisible sphere

Answers

Answer 1

Answer: It showed that the atom contains a small dense nucleus. The reason why this can be concluded is that the experiment showed that alpha particles can for the most part pass right through the foil. This showed that the nucleus of the atom is very small and takes up a very small portion of the size of an atom since the nucleus is what would reflect the alpha particle. If atoms were not mostly empty space, the alpha particles would have been bounced back and the opposite of what was observed would have happened (all or at least the majority would be bounced back instead the majority getting through with only a small portion being reflected back).

I hope this helps. Let me know in the comments if anything is unclear.

Answer 2

Answer:

Final answer:

The gold foil experiment, conducted by Ernest Rutherford, discovered the existence of a small, dense nucleus within an atom, making answer (2) the correct one.

Explanation:

The gold foil experiment was conducted by Ernest Rutherford and led to the discovery of a small, dense nucleus within the atom. This means that the correct answer to your question is (2) contains a small, dense nucleus. Prior to this experiment, the widely accepted model was the 'plum pudding' model, which had negatively charged electrons embedded within a positively charged sphere. The gold foil experiment upended this model as it was discovered that most alpha particles passed through the gold foil undeterred, but a small fraction was deflected at large angles, suggesting that a tiny but dense packet of positive charge — identified as the nucleus — existed in the center of the atom. This discovery led to the formation of the Rutherford atomic model.

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Check the statements that are a part of the Early Atomic Theory. a.Scientists believe that the atom is made up of elements. b.Atoms combine in whole number ratios to form compounds. c.Atoms cannot be created or destroyed during a chemical reaction.

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Answer: C

Explanation: Because it cannot, no one can create or destroy an atom, it just moves. It either bonds to another atom or it roams freely.

A lahar is a type of mudflow that occurs

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after a volcanic eruption is the answer

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Which scientist did people think was insane so they dismissed his ideas for almost 2000 years?

Answers

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Why are the atomic masses of elements usually decimal numbers? Provide an answer using 3 – 4 sentences in your own words.

Answers

Explanation: An element does not exist alone in the nature. It exist in the form of isotopes of its own. Atomic mass of that element is the average atomic masses of the isotopes.

Average atomic mass of the element is defined as the sum of atomic masses of isotopes each multiplied with their respective natural fractional abundance.

Mathematically,

$\text{Average atomic mass}=\sum_(i=1)^n\text{(atomic mass of an isotopes)}_i* \text {(fractional abundance)}_i$

This is the reason, why an element does not have a whole number atomic mass, but exist in decimal numbers.

The atomic masses of elements are usually written in decimal numbers because they are non-terminating. The numbers usually are rounded to the nearest thousandths place. The atomic masses are more exact in decimal numbers.

Prehistory can be described as _____.what happened last year
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Answers

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What is the complete ionic equation for this reaction?2KOH(aq) + H2SO4(aq) → 2H20(1) + K2SO4(aq)
O A. 2K+ + OH + H2SO4 → OH + 2H+ + K2SO4
B. OH + 2H+ + 2H20()
C. 2KOH + H2SO4 → 2H20 + K2SO4
D. 2K+ + OH + 2H+ + SO42- → 2H20() + 2K+ + SO42-
SUBMIT

Answers

Answer:

The answer is "Option D".

Explanation:

The entire ionic equation for all the substances, which are ionic compounds but are available in an aquatic is represented in the form with ions in the full ionic equation.

In the Net ionic equation, it doesn't have the particulate matter throughout the net ionic equations throughout the equations.

In the Spectator ions, it doesn't participate in interactions mostly on reaction and the material hand. From both sides, the very same ions are present.

The evenly balanced chemical formula is,

$2KOH (aq)+ H_2SO_4(aq) \longrightarrow 2H_2O(l) + K_2SO_4$

It is the separate organic compound that full ion formula will match the choice D.

Final answer:

The complete ionic equation for the reaction is 2K+ + 2OH- + 2H+ + SO42- → 2H2O + 2K+ + SO42-.

Explanation:

The complete ionic equation for the reaction 2KOH(aq) + H2SO4(aq) → 2H20(l) + K2SO4(aq) is:

2K+ + 2 OH- + 2 H+ + SO42- → 2 H2O(l) + 2 K+ + SO42-

The equation is balanced in terms of mass and charge by adding spectator ions (K+ and SO42-). The net ionic equation can be obtained by eliminating the spectator ions, leaving only the species that undergo a chemical change.

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