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2 years ago

How does an atom of potassium-41 become a potassium ion with a +1 charge? 19 K 39.10

Physics

2 answers:

patriot [66]2 years ago

6 0

Answer:

B. The atom loses 1 electron, to make a total of 18.

Explanation:

Since proton lies inside the nucleus of the atom so it is bounded strongly by the nuclear forces

So it is very difficult to charge an atom by transfer of protons as it need to work against nuclear forces

But electrons orbit around the nucleus in different energy state so all those electrons which are lying at the outermost orbit is loosely bound and hence it is easy to remove that electron.

Since potassium ion has atomic number 19

so for a neutral ion it has 19 electrons and 19 protons in it

now in order to make it a charge of +1

so we can remove one electron from it so that it has 19 protons and 18 electrons it so due to which it will have +1 charge on it

so correct answer will be

B. The atom loses 1 electron, to make a total of 18.

stiv31 [10]2 years ago

5 0

It is very difficult for an atom to accept a proton. It can only be done under very special circumstances. So A and C are both incorrect. I don't see how D is possible. The atom does lose 1 electron, but how it gets 21 is think air.

The answer is B which is exactly what happens.

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A 50-n crate sits on a horizontal floor where the coefficient of static friction between the crate and the floor is 0.50 . A 20-

andreyandreev [35.5K]

The resultant static friction force is equal to 20 N to the left.

Why?

I'm assuming that you forgot to write the question of the exercise, so, I will try to complete it:

"A 50-n crate sits on a horizontal floor where the coefficient of static friction between the crate and the floor is 0.50 . A 20-n force is applied to the crate acting to the right. What is the resulting static friction force acting on the crate?"

So, if we are going to calculate the resulting static friction force, it means that there is no movement, we must remember that the friction coefficient will give us the maximum force before the crate starts to move.

We can calculate the static friction force by using the following formula:

$Fr=F(appliedforce)$

Since the crate is not moving (static), the static friction force acting on the crate will be equal to the applied force.

Calculating we have:

$Fr=F(appliedforce)$

$Fr=20N$

Hence, the static friction force is equal to 20 N to the left (since the applied force is acting to the right)

So,

$FrictionForce=AppliedForce$

Since the static friction force is equal to the applied force, the crate does not start to move.

Have a nice day!

8 0

2 years ago

Does the surrounding air become warm or cool when vapour phase of H2O condenses? Explain

mel-nik [20]

The surrounding air will become warm when water vapor condenses. The vapors when become water will give away latent heat they have, we know that latent heat is required for the object to change states, so, the latent heat the water vapor had when it became water vapor from water will be given out when it again becomes water.

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2 years ago

A boy throws a water ballon such that it hits his sister standing 10m away. The boy threw the water balloon at an angle of 35 de

Tresset [83]

Answer: 7.734 m/s

Explanation:

We have the following data:

$\theta=35\°$ The angle at which the water ballon was thrown

$x=10 m$ The horizontal distance of the water ballon

$g=-9.8 m/s^{2}$ The acceleration due gravity

We need to find the initial velocity $V_{o}$ at which the water ballon was thrown, and we can find it by the following equation:

$x=V_{o}cos \theta T$ (1)

Where $T=2t$ is the total time the water ballon is on air

On the other hand, when we talk about parabolic motion (as in this situation) the water ballon reaches its maximum height just in the middle of this parabola, when $V=0$ and the time $t$ is half the time $T$ it takes the complete parabolic path.