PHYSICS HIGH SCHOOL

The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. Which comparison is best supported by this information?

Answers

Answer 1
Answer:

Answer;

The comparison that would be best is;

They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.

Explanation;

  • Beryllium (Be) is an element is the periodic table with an atomic number of 4, which means it has 4 protons in the nucleus and also 4 electrons in the energy levels, since the number of protons is equal to the number of electrons.
  • Beryllium has an electron configuration of 2: 2, which means it has two valence electrons, and has two energy levels which means it occupies period two of the periodic table, and group two of the periodic table.
  • Barium (Ba) on the other had, has an atomic number of 56, which means it has 56 protons and 56 electrons. Thus it has an electron configuration of; 2;8;18;18;8;2;  this shows that it has 6 energy levels thus occupies period 6 and is in group two since it has two valence electrons.
Answer 2
Answer: The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. the comparison is best supported by this information is that beryllium has a lower atomic radius than Barium

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Frequency refers toa. how much sweat is lost during exercise.
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d. how many times per week a person exercises.

Answers

Frequency refers to how many times per week a person exercises. The correct option among all the options that are given in the question is the fourth option or option "d". Frequency is actually the rate at which the person does the work or rather the average. I hope this answer has come to your help.

When work is done on an object, the object gains energy. true or false

Answers

True. When work is done on an object, the object gains energy

Answer:

True

Explanation:

i took the quiz

Which of these is considered a satellite galaxy of the Milky Way Galaxy?a. Virgo
b. Andromeda
c. Small Magellanic Cloud
d. Copernican Dwarf Elliptical

Answers

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How to find initial velocity

Answers

Answer:

Velocity= Distance divided by time divided by degree or direction.

Explanation:

Speed=DIstance divided by time
1.Initial Velocity Formula Questions:
2.Answer: The initial velocity can be found using the formula:
3.vi = vf - at.
4.Answer: The initial velocity can be found using the formula:
5.vi = vf - at.

What is the force required to produce an acceleration of 46.4

Answers

That depends on the mass of the object, and the unit of the '46.4' .

If the '46.4' is ' meters per second² ' , then the force required is

       (mass of the object in kilograms) x (46.4)    newtons .

the pressure of a sample of gas was 97.8 kPa and the volume of the gas was 3.75 l. if the gas occupied a container with a volume of 8.00 L, what would the pressure in the container be?

Answers

If the temperature stays the same then:
P1V1=P2V2 
so:
97.8*3.75=8P
366.75=8P
P= 45.84 kPa is the new pressure
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