Chemistry, 30.08.2019 16:30, megankbrown

Be sure to answer all parts. name the compound that has the chemical formula feo. (select) =(select) (select) references ebook & resources o type here to search

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answered: kookycookiefanx

Iron (II) oxide

Explanation:

Chemical formula of the given compound = FeO

The given compound is an oxide.

In oxides, oxidation state of 'O' is -2.

Let oxidation state of Fe be x. It is a neutral compound.

Therefore, x - 2 = 0

x = +2

So, the oxidation state of Fe in FeO = +2

In the nomenclature of inorganic compounds, cation is named first. After that oxidation state of cation is written. Name of anion is written after that.

Cation = Iron

Anion = oxide

So the name of the given compound would be Iron (II) oxide.

answered: Guest

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

answered: Guest

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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Be sure to answer all parts. name the compound that has the chemical formula feo. (select) =(select)...