Chemistry, 02.12.2020 02:00 masonorourke

Someone help me please i’ll give

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Answer from: emilyplays474

True

Explanation:

Answer from: anthonysf

True.

Explanation:

A chemical change is when something occurs, it cannot be changed back its original state.

In this question, the fruit is rotting. There is no way you can change that rotting fruit back into its fresh, primary state. Just like you can't bring back a clean sheet of paper after burning it into ashes.

If you need more context, here is this evidence from a website, "The rotting of fruit is a chemical reaction. This is because when fruit spoils, an enzymatic reaction occurs. An enzymatic reaction is defined as "the conversion of one molecule to another". Because an enzymatic reaction causes molecules to change when rotting, rotting is a chemical reaction."

I hope this helps you! Let me know if you have any questions.

Answer from: Quest

Because it was a dramatically big guy

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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