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fenix001 [56]
3 years ago
14

When traveling from oxygen to sulfur to selenium, through this group in the periodic table, what is changing?

Chemistry
2 answers:
djverab [1.8K]3 years ago
5 0
Horizontal rows are called periods. As you travel downwards, the period is changing. (Oxygen in period 2, sulfur in period 3, and selenium in period 4)
mel-nik [20]3 years ago
4 0

<u>Answer: </u>The size of the element is changing.

<u>Explanation:</u>

Oxygen, sulfur and selenium are the elements which belong to Group 16 and periods 2, 3 and 4 respectively.

Atomic size of an element is defined as the distance between the nucleus and the outermost shell.

In a periodic table, the size of an element decreases as we move across a period and increases as we move down the group.

Down the group, new shell is getting added around the nucleus and electron is getting added in the new shell. Hence, the distance of the outermost shell from nucleus increases.

Therefore, the size of the element is changing.

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In the equation:<br><br> 23491Pa → 234 92U + X<br><br><br> The X represents a
Bad White [126]
Beta particle in the reaction
3 0
3 years ago
Based on the following molecular weight data of polypropylene, determine the degree of polymerization Molecular Weight Range (g/
Lady bird [3.3K]

Answer:

785

Explanation:

Molecular. X. W

Weight

8000-16000 0.05 0.03

16000-24000. 0.017. 0.08

24000-32000. 0.22. 0.18

32000-40000. 0.25. 0.35

40000-48000. 0.22. 0.27

48000-56000. 0.09. 0.09

Mean weight X*M. W*M

12000. 600. 240

20000. 3200. 2000

28000. 6720. 5600

36000. 10080. 10800

44000. 8800. 11880

52000. 3640 3640

Total=33040g\mol 36240

Note before repeat molecular weight m= 3*12.01+6*1.008=

42.08g/mol

Degree of polymerization= total W*M/w=33040/42.08 =785

8 0
3 years ago
What statement accurately describes the charge of the nucleus of an atom?
Evgen [1.6K]
The charge of a nucleus is positive
3 0
3 years ago
Describe how the sound of the person shouting will move through the<br> water.
shepuryov [24]

Answer:

You have probably heard that sound is really vibrations. The sound of a person shouting will propagate as a longitudinal pressure wave in the air in all directions. (That's a fancy way of saying vibrations in the air, but longitudinal waves are important to understand if this is for a class.) Think of the sound as a sphere of air molecules pushing against the sphere of air molecules surrounding them. As the sound travels outward, the radius of this sphere is getting larger and larger (increasing at the speed of sound). As that radius gets bigger, the amount of momentum that pushed the air molecules at the origin of the noise (in the mouth of the shouter) now has to push against a much larger sphere of air molecules. The surface area of a sphere of radius 10 is 4 times bigger than a sphere of radius 5 (SA=4*pi*r^2), so there is about 1/4 as much momentum being transferred to each molecule at radius 10 compared to radius 5. This gives rise to the "Inverse Square Law", or the idea that the intensity of sound decreases by a factor of the radius squared.

Put simply, the intensity of the vibrations in the air decreases faster and faster as the sound gets farther away from the source until the momentum from the initial sound source is so dissipated that listeners far enough away cannot even detect the sound at all.

5 0
3 years ago
Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pres
dimaraw [331]
Density = mass / volume
Because the dimensions of the barometer are the same for each case, we can compare the heights of the liquids instead of the volume.

ρ(mercury) = 13.6ρ(water)
mass(mercury)/760 = 13.6 x mass(water)/Height(water)

Masses of the liquids will also be the same.

Height of water = 13.6 x 760
Height of water = 10,336 mm
5 0
3 years ago
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