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andreev551 [17]
3 years ago
11

Atoms with certain characteristics are radioactive. Which is least likely to be radioactive? O A. all atoms with an atomic numbe

r over 83 B. all atoms with twice as many neutrons as protons C. all atoms with an atomic number under 40 O D. all atoms with half as many neutrons as protons​
Physics
1 answer:
Luden [163]3 years ago
8 0

Answer:

The answer an be the option A.

Explanation:

Because radioactive substances have atomic number greater than 82.

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Why does a lone pair of electrons occupy more space around a central atom than a bonding pair of electrons?
Inessa [10]

Answer:

The lone pair of electrons occupy more space because the electrostatic force becomes weaker.

Explanation:

When there is a bond pair of electrons in the 2 positively charged the atomic nuclei draw the electron density towards them, thereby reducing the bond diameter.

In the case of the lone pair, only 1 nucleus is present, and the enticing electrostatic force becomes weaker and the intensity of the electrons will be increases. Therefore, the lone pair occupies more space than the pair of bonds.    

5 0
3 years ago
Help pls you don't have to answer all​
miskamm [114]

Answer:

5. The 2 features we need to harness the energy from tides are when tides come in and when tides come out.

6. Tidal energy is the most predictable type of renewable energy is because we know the exact locations of the sun and moon all year round.

6 0
4 years ago
Read 2 more answers
A machine lifts a 44,760 newton crate 2 meters into the air in 10 seconds. How many horsepower does the machine
VladimirAG [237]

Answer:

<u>8952 W</u>

Explanation:

<u>Given</u> :

  • Force = 44,760 Newtons
  • Displacement = 2 meters
  • Time taken = 10 seconds

<u>Equation</u>

  • Power = Work / Time
  • Power = Force x Displacement / Time

<u>Solving</u> :

  • P = 44760 x 2 / 10
  • P = 4476 x 2
  • P = <u>8952 W</u>
7 0
2 years ago
THIS IS DUE IN 5 MINUTES IM BEGGING YOU PLEASE ANSWER
Archy [21]

Answer:

the answer is A or 900

Explanation:

what u have to do is add all the forces together and then u get ur answer.

4 0
3 years ago
NEED HELP ASAP!! I AM MARKING BRAINLIEST!!
iogann1982 [59]

So the air evaporate s and mix the temptures and marks air power to the same theme as the other the two degrees  lower and lower until they are the same

8 0
3 years ago
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