Chemistry, 14.12.2019 18:31 nerogravestones

Which element is nuclear fusion least likely to produce?
hydrogen, which has an approximate mass of 1
chlorine, which has an approximate mass of 35
argon, which has an approximate mass of 39
silicon, which has an approximate mass of 28

i know the answer is not b

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The element nuclear fusion is least likely to produce is hydrogen, which has an approximate mass of 1. This is because nuclear fusion makes use of hydrogen wherein atoms of hydrogen are combined to form heavier elements. This means that hydrogen cannot combine to form hydrogen. The lightest element that fusion can form is helium (2).

Answer from: alexabessin

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.

Answer from: Quest

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

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Which element is nuclear fusion least likely to produce?
hydrogen, which has an approximate...

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