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Pavel [41]
3 years ago
9

Potassium-41 has 19 protons. How many neutrons does this isotope have ?​

Physics
1 answer:
AysviL [449]3 years ago
3 0

Answer:

20 neutrons

Explanation:

This will get you the mass number of the most abundant potassium isotope. You now know that the most abundant isotope of potassium contains 20 neutrons. All isotopes of potassium will have the same number of protons inside their nucleus, i.e. 19 protons.

I hope this helps you.

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Resonance structures have _______ connectivity of atoms and _______ distribution of electrons.
Arte-miy333 [17]

Answer:

Resonance structures have <u> </u><u>same</u><u>  </u>  connectivity of atoms and <u> differ only in</u> distribution of electrons.

Explanation:

Atoms supply the electrons from their outer electron shells. Electrons are found free in nature and are grouped around the nucleus into shells. Electrons can be further explained as negatively charged subatomic particle. Electrons have properties of both particles and waves and they can be moved around.

Resonance structures are imaginary structures and not all of them are created equally. Resonance structures have two or more possible electron structures, and, the resonance structures for a particular substance sometimes have different energy and stability. When resonance structures are identical, they are important descriptions  of the molecule. The position of the atoms is the same in the various resonance structures of a compound, but the electrons are distributed differently around the structure.

3 0
4 years ago
Let this oscillator have the same energy as a mass on a spring, with the same k and m, released from rest at a displacement of 5
allochka39001 [22]
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3 0
3 years ago
Find the magnitude of the gravitational force a 63.5 kg person would experience while standing on the surface of Earth with a ma
Anastaziya [24]

Answer: 3976N

Explanation:

Using the formula for calculating gravitational force between two masses, we have

F = GMm/r^2

Where G is the gravitational constant

M and m are the masses

r is the distance between the masses

F= 6.673 × 10-¹¹ × 5.98 × 10²⁴ × 63.5/ (6.37 × 10^6)^2

F= 2.533×10^16/6.37×10^12

F= 0.3976×10⁴N

F= 3976N

3 0
3 years ago
A typical rechargeable deep-cycle battery for an electric trolling motor (fishing boat) delivers 10A of current at a voltage of
Oksi-84 [34.3K]

Answer:

a) 360 kQ

b) 4.32 MJ

c) 1200 W-h

Explanation:

a) The definition of the current is.

I= \frac{Q}{t}

having a count that 10 hours = 36.000 s

Q = I*t

Q = 36000*10 = 360.000 [Q]

b) The definition of the Energy in power terms is.

E = \int\limits^{t}_{0} {P} \, dt

and the definition of power is:

P = V*I = 12 * 10 = 120 [W]

replacing in the energy formula.

E = \int\limits^{36.000}_{0} {120} \, dt

solving the integral, have into account that t is in seconds.

E=P*t=120*36000=4.320.000=4.32 [MJ]

c) The energy in W-h, we can find it multiplying power by hours

E = P*t =120*10 = 1200 W-h.

3 0
3 years ago
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