1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olya-2409 [2.1K]
2 years ago
15

In Rutherford experiment some alpha particles fired at a gold foil bounced backward as a result of ... A.reflection from the sur

faces of gold atoms B.electrostatic repulsion by gold nuclei C.electrostatic repulsion by electronsD.all of the aboveE.none of the above
Chemistry
2 answers:
IRINA_888 [86]2 years ago
6 0

Answer: The correct option is B (electrostatic repulsion by gold nuclei).

Explanation:

In the Rutherford's experiment, he used positively charged particles called alpha particles to bombard an atom in order to find out what is inside the atom. Together with two other scientists, Geiger and Marsden, they used a narrow beam of alpha particles emitted from a radioactive source to bombard a thin gold foil. The scattering of the particles from the gold foil was detected by a movable zinc sulphide screen which could be rotated to various positions around the foil.

Each time an alpha particle hit the screen, a visible flash of light or scintillation was produced. This was observed by a microscope attached to the screen. It was then observed that some of the particles followed a straight path through the gold foil while a few where scattered in a backward direction. This was as a result of electrostatic repulsion by gold nuclei which occurs due to the greater part of the mass of the atom was concentrated in a minute nucleus with positive charge.

Amanda [17]2 years ago
3 0

Answer:

B.electrostatic repulsion by gold nuclei

Explanation:

According to Rutherford's experiment, a thin gold foil was bombarded with alpha particles. Some of the particles passed through the foil undeviated, some were scattered through large angles while some bounced backwards.

It follows that the particles that bounced backwards must have encountered a massive particle of like charge.

The atom is composed of a nucleus which contains positively charged particles. Some of the alpha particles which are positively charged particles bounced back when they encountered the positively charged particles in the nucleus.

You might be interested in
A car is traveling 83.3 kilometers per hour. What is its speed in miles per minute? One kilometer = 0.62 miles.
Leya [2.2K]
Hi. 2fouls! :)

First convert the number from kilometer to miles:
83.3*0.62
=51.646 miles

Now to find the miles per minutes,divide the miles per hours by 60 (the amount of minutes in an hour.)

51.646/60
=0.860766667

The car is travelling at a speed of 0.860766667 miles/minute.

Hope this helps.
-Benjamin

3 0
3 years ago
Read 2 more answers
Of the following which element is the heaviest? helium argon lithium aluminum
Georgia [21]

Answer:

Lithium

Explanation:

it is the only metal listed.

5 0
3 years ago
An inflatable swimming pool held 1,000 gallons of water. It sprang a leak, and 5% of the water leaked out of the pool.
iVinArrow [24]

Answer:

50

Explanation:

If you want a percent as a decimal so you can divide you must make it a decimal for example in your case it would be like this, 0.05, then all you do is divide 1,000 by 0.05

8 0
2 years ago
Convert 321 millimeters to picometers
pantera1 [17]
3.21e+11 is your answer for 321 millimeters in picometers. Hope this helps!

3 0
3 years ago
How many grams of KCIO3 are needed to produce 5.00 of O2 at STP?
Arlecino [84]
2KClO₃ → 2KCl + 3O₂

mole ratio of KClO₃ to O₂ is 2 : 3

∴ if moles of O₂ = 5 mol

then moles of KClO₃ = \frac{5 mol   *   2}{3}

                            = 3.33 mol


Mass of KClO₃ needed = mol of KClO₃ × molar mass of KClO₃

                                      = 3.33 mol × ((39 × 1) + (35.5 × 1) + (16 × 3) g/mol

                                      = 407.93 g
6 0
3 years ago
Other questions:
  • Which is a quantitative observation A. 15 m long B. red color C. rough texture D. strong odor
    13·1 answer
  • The barcoding process starts with who
    15·1 answer
  • If you had 0.867 miles of salt, NaCI , in a 0.69 L solution, what would be the molarity
    12·1 answer
  • A 18.00 g candy bar is found to contain 11.00 g of sugar. How many mg of sugar does the candy bar contain ?
    11·1 answer
  • Revise and repeat: Is more water always better? Create your own experiments to find the ideal amount of water for each kind of p
    7·1 answer
  • Desalination is the process of converting sea water into drinking water. Older processes used a desalination method to desalinat
    11·2 answers
  • A red hot iron bar is dipped into 600 ml of water ( 600.g of water) which causes
    9·1 answer
  • Which is the same length as a light-year?
    12·2 answers
  • I need help plss asap
    8·1 answer
  • Explain how to calculate the number of grams in 5.50 x 1022 atoms.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!