Chemistry, 05.10.2019 14:30 marcaveli294

Which contains more thermal energy: an ice cube or an iceberg?

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If an iceberg is the same temperature on the outside as it is on the inside then it becomes water, just like an ice cube. Imagine if you made a huge ice cube and you core drilled it, it’s insides would be colder than it’s outsides. An iceberg is simply an extension of that.One could think of it as a thermal capacitor, or a huge cooler pac.An iceberg is a piece of a glacier which was formed by ancient snow. The weight of years of snow fuses the snow into ice. Gravity has moved it downhill until it was at the edge of ocean and cracked off under it’s own weight. Included along with ice, atmospheric dust, are many tiny air bubbles trapped when the snow fell.

Answer from: Quest

answer: 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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