Chemistry, 15.01.2020 03:31 jameslinimk

After a cookie has been digested, glucose molecules enter the bloodstream by the process of?

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Answer from: valenzueladomipay09u

After a cookie has been digested, glucose molecules enter the bloodstream by the process of diffusion.

Diffusion occurs when a particle may be an ion, molecule, or atom moves from a higher concentration region to a lower concentration region. When the concentration of the substance becomes equal throughout the region then diffusion stops.

An example of diffusion is an exchange of gas occurring during the respiration process.

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Answer from: ethanmoct6

After a cookie has been digested, glucose molecules enter the bloodstream by the process of diffusion.

Explanation:

A substance can enter into a cell or leave from a cell in two ways namely: Active and Passive transport. Simple, Facilitated diffusion and osmosis comes under the passive category. Diffusion occurs when a particle which may be an ion, molecule or atom, moves from a higher concentration region to that of a region that has lower concentration.

When the concentration of the substance becomes equal throughout the region then diffusion stops. Some of the examples of diffusion are:

Exchange of gas that occurs in photosynthesis.Exchanging of gas occurring during respiration process.Exchange of gas that occurs in alveoli.

Answer from: Quest

1 a

2 d

3 a

4 c

explanation:

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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