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pochemuha
3 years ago
14

The combination of all the forces on an object is called?

Chemistry
1 answer:
krek1111 [17]3 years ago
6 0

Answer:

net force

Explanation:

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The temperature is 298.5 K, which corresponds to 0.50°C.

A jacket would be appropriate clothing for this weather.

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Give one example of fast erosion and one example of slow erosion. Use complete sentences.
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An example of erosion is the Grand Canyon, which was worn away over time by the Colorado river.
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Which of these is a compound?<br> A. Na<br> B. Cl<br> C. NaCl<br> D. C
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Option : C

Explanation:

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3 years ago
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Neptunium-237 undergoes a series of α-particle and β-particle productions to end up as thallium-205. How many α particles and β
Fantom [35]
<h3>Answer:</h3>

8 alpha particles

4 beta particles

<h3>Explanation:</h3>

<u>We are given;</u>

  • Neptunium-237
  • Thallium-205
  • Neptunium-237 undergoes beta and alpha decay to form Thallium-205.

We are required to determine the number of beta and alpha particles produced to complete the decay series.

  • We need to know that when a radioisotope emits an alpha particle the mass number reduces by 4 while the atomic number decreases by 2.
  • When a beta particle is emitted the mass number of the radioisotope increases by 1 while the atomic number remains the same.

In this case;

Neptunium-237 has an atomic number 93, while,

Thallium-205 has an atomic number 81.

Therefore;

²³⁷₉₃Np → x⁴₂He + y⁰₋₁e + ²⁰⁵₈₁Ti

We can get x and y

237 = 4x + y(0) + 205

237-205 = 4x

4x = 32

 x = 8

On the other hand;

93 = 2x + (-y) + 81

but x = 8

93 = 16 -y + 81

y = 4

Therefore, the complete decay equation is;

²³⁷₉₃Np → 8⁴₂He + 4⁰₋₁e + ²⁰⁵₈₁Ti

Thus, Neptunium-237 emits 8 alpha particles and 4 beta particles to become Thallium-205.

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3 years ago
Identify each of the atomic models described here.
bagirrra123 [75]

Dalton model :) Hope this helped.

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3 years ago
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