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Usimov [2.4K]
3 years ago
13

Please help it's Chemistry​

Chemistry
1 answer:
dsp733 years ago
7 0

Answer:nothing beats the chemistry between us :) smooth right?

Explanation:I’m pretty sure u have to show the part before the questions so that people can respond to it since there is no info on how to answer the question :p

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365 days and five hours

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2 years ago
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What are two ways in which you can increase the potential energy of a marble on ramp
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You can make the ramp really steep and hold the marble at the top of it

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2 years ago
Arrange the following atoms in order of increasing first ionization energy: He, Be, Se, Ne
Alex17521 [72]

Answer:

Be (899 kj/mol) , Se (940.9 kj/mol), Ne(2081 kj/mol), He (2370 kj/mol),

Explanation:

For noble gases as they have complete octet so they require high amount of energy to remove the electron.

Trend along period:

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.

Trend along group:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

As the size of atom increases the ionization energy from top to bottom also  decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.

8 0
3 years ago
Which molecule transports oxygen in red blood cells? (1 point)
Afina-wow [57]
The answer is a. hemoglobin is the molecule that transports oxygen in red blood cells :))))
i hope this is helpful
have a nice day
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3 years ago
Pick 1 answer, please help!
olga nikolaevna [1]

Answer:

B

Explanation:

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2 years ago
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