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salantis [7]
3 years ago
12

Rutherford proposed that atoms have positive nuclei. Which statement correctly describes the nucleus of an atom?

Chemistry
2 answers:
DIA [1.3K]3 years ago
8 0
I'm not 100% sure but I'm leaning towards D. :)
Over [174]3 years ago
5 0

Answer:

D.)Most of the mass of an atom is located in the nucleus.

Explanation:

Rutherford conducted his famous gold foil experiment which refined our understanding of the structure of an atom. Through the experiment he observed that when positively charged alpha particles were bombarded against a thin gold foil, majority of them passed through the foil undisturbed whereas a small percentage retraced their path.

There were two main conclusions:

-Since most alpha particles simply passed through undeviated this suggested that majority of the space inside the atom is empty

- Also, since some of them completely bounced back this suggested that there is a positively charged core in which the mass of the nucleus is concentrated.

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The law of unbalanced forces is also known as? :
diamong [38]

Answer:

Newton's 2nd Law

Explanation:

Newton's Second Law of Motion is concerned with the effect that unbalanced forces have on motion.

5 0
2 years ago
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The downward pressure on the hg in barometer is ______ the pressure of the atmosphere.
enyata [817]

The downward pressure on the hg in barometer is <u>the same as</u> the pressure of the atmosphere.

The atmospheric pressure or barometric pressure is the force exerted by the air in the atmosphere on the earth's surface.

The atmospheric pressure is caused by air molecules colliding with the surface. The atmospheric pressure at sea level is about 101 kPa and at the cruising altitude of a passenger plane it is 27 kPa.

The atmospheric pressure decrease as the height of a surface above ground level increases.

<h3>What is a barometer?</h3>

A barometer is a measuring instrument used to measure the atmospheric pressure or weight of the air, which is useful for making weather predictions.

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7 0
1 year ago
How many electrons does N 3-have?​
Allushta [10]

Answer: 10 electrons

Explanation:

N represents Nitrogen. Nitrogen has an atomic number of 7, this means in ground state it has 7 electrons also.

But N-3, means Nitrogen has gained 3 more electrons. So, we have 10 electrons

8 0
3 years ago
The model on the right looks bumpy, but when you break a large salt crystal in two, the edges of the split often look straight a
emmasim [6.3K]

There is no problem with the model formed by atoms as solid spheres for macroscopic measurements because the atoms are extremely small.

<h3>What is Dalton's atomic model?</h3>

This was formulated in 1808 and states that atoms with spheres cannot be divided. It also states that solids are formed by contact between the spheres and chemical compounds from joining of atoms of two or more elements.

The size of the atoms in the form of sphere is very small as it is known that it is of the order of 10⁻⁹ m, therefore, having a macroscopic crystal more than 10⁻⁶ m in length which is why the model of the atom as solid spheres for macroscopic measurements has no problem.

Read more about Dalton's atomic theory here brainly.com/question/13157325

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5 0
1 year ago
Calculate the moles of argon gas at STP in 33 L. Round answer to 2 significant figures.
babymother [125]

Answer:

1.5 mol

Explanation:

Step 1: Given data

  • Volume of argon gas: 33 L
  • Standard temperature: 273.15 K
  • Standard pressure: 1 atm

Step 2: Calculate the moles corresponding to 33 L of argon at standard temperature and pressure (STP)

At STP, 1 mole of argon gas occupies 22.4 L.

33 L × 1 mol/22.4 L = 1.5 mol

4 0
3 years ago
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