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# Identify the group of elements that corresponds to the following generalized electron configuration: [noble gas]ns 2 (n−1)d 2

For the answer to the question above, I think you are referring to the group of four elements. The Titanium, Zirconium, Hafnium and lastly the Rutherfordium are the group of elements that corresponds to the configuration you are asking.
I hope my answer helped you

## Related Questions

Posted in Chemistry

Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A particular alloy with a density of 8.80 g/cm3 and containing 0.073% Si by mass is used to make a rectangular plate that is 15.0 cm long, 12.5 cm wide, and 2.50mm thick and has a 2.50-cm-diameter hole drilled through its center such that the height of the hole is 2.50mm . The silicon in the plate is a mixture of naturally occurring isotopes. One of the those isotopes is silicon-30, which has an atomic mass of 29.97376 amu and a percent natural abundance of 3.10% How many silicon-30 atoms are found in this plate? Express your answer numerically using two significant figures.

Answer is: there are 1.82·10²⁰ silicon-30 atoms.

V₁(alloy) = 15 cm · 12.5 cm · 0.25 cm.

V₁(alloy) = 46.875 cm³; volume of the alloy without hole.

V(hole) = 0.25 cm · (1.25 cm)² · 3.14.

V(hole) = 1.23 cm³

V₂(alloy) = 46.875 cm³ - 1.23 cm³.

V₂(alloy) = 45.65 cm³; volume of the alloy with hole.

m(alloy) = V₂(alloy) · d(alloy).

m(alloy) = 45.65 cm³ · 8.80 g/cm³.

m(alloy) = 401.7 g; mass of the alloy.

ω(Si) = 0.073% ÷ 100%.

ω(Si) = 0.00073.

m(Si) = ω(Si) · m(alloy).

m(Si) = 0.00073 · 401.7 g.

m(Si) = 0.293 g; mass of silicon it the alloy.

m(Si-30) = m(Si) · ω(Si-30).

m(Si-30) = 0.293 g · 0.031.

m(Si-30) = 0.0091 g; mass of the silicon-30.

n(Si-30) = m(Si-30) ÷ M(Si-30).

n(Si-30) = 0.0091 g ÷ 29.97376 g/mol.

n(Si-30) = 0.000303 mol; amount of the silicon-30.

N(Si-30) = n(Si-30) · Na (Avogadro constant).

N(Si-30) = 0.000303 mol · 6.022·10²³ 1/mol.

N(Si-30) = 1.824·10²⁰.

Posted in Chemistry

Draw a complete Lewis structure for the conjugate acid of nitromethane that shows all bonds, unshared electron pairs, and minimized formal charges, where appropriate.

Lewis structures are shown below

Explanation:

• In Lewis structure of nitromethane, a negative charge is present on oxygen atom in nitro group.
• Hence this oxygen atom acts as a basic center preferably.
• Therefore conjugate acid of nitromethane should be drawn by adding a hydrogen atom with this oxygen atom.
• Lewis structure of nitromethane as well as it's conjugate acid has been shown below including all the lone pairs and formal charges

Posted in Chemistry

Which of the following ions would represent the ion of an element from Group 2A? A. X2- B. Y3+ C. Z+ D. A2+

An element belongs to particular group is related to the number of electrons present in the outer shell of the atoms. In given case, group is 2, therefore, number of valence electrons is 2 implies it has ability to lose two electrons to get +2 charge.

Therefore, ion formed after removal of two electrons is .

Hence, option (D) is the correct answer.

Posted in Chemistry

Which grouping has the least complex body plan? If you were on a research expedition in the kingdom of Tonga, a coral atoll in the South Paciﬁc, would you ﬁnd these organisms?

YES, I WOULD FIND THOSE ORGANISMS.

The Kingdom of Tonga is a Polynesian Archipelago in Oceania consisting of 176 islands. During a month long coral reef research mission in Tonga, the Foundation focused on islands in the Ha’aipi group, Vava’u and Niuatoputapu. Haʻapai, directly west of the Tonga trench in the central part of Tonga, is made up of 51 volcanic islands and includes Kao, the highest point in the kingdom (1,046 m). Vavaʻu has one large island and 40 smaller ones, and includes the second largest city, a large harbor.  The north side of the main island is lined by 200 m high cliffs and extensive open network of fjord-like channels that stretch inland on the north side. Nearly 300 km north of Vavaʻu, close to the border of Samoa is Niuatoputapu, a sparsely inhabited (population 150)  eroded remnant of a volcano surrounded by a large uplifted reef. This island was badly damaged by a tsunami following a submarine earthquake off Samoa in 2009.

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How many electrons are in O2.

Number of electron in O = 8
So, in O2 it would be: 8 * 2 = 16

Hope this helps!

Posted in Chemistry

Which type of atom has the strongest attraction for electrons in bond formation? barium (Ba) chlorine (Cl) iodine (I) strontium (Sr)

Answer: Chlorine has the strongest attraction for electrons in bond formation.

Explanation:

Chlorine is highly electronegative as compared to iodine and has high electron gain enthalpy. So, it will readily accept an electron in order to complete its octet. The electronegativity decreases down the group from Cl to I, and hence the tendency to gain an electron decreases.

In case of Barium, and Strontium there are completely filled sub shells and therefore the tendency to gain an electron is the least.

Thus, it can be concluded that chlorine has the strongest attraction for electrons in bond formation.

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Which kind of substance accepts an electron pair? base hydroxide ion acid alkali

Answer : The correct option is Acid.

Explanation :

• Acid : Acids are those which accepts an electron-pairs.
• Base : Bases are those which donates ab electron-pairs.
• Alkali : It is a base that dissolves in water. It is basically a base and the pH greater than 7.
• Hydroxide ion : It is a poly-atomic ion which is negatively charged.

Therefore, the acid is a substance which accepts an electron-pair.

Posted in Chemistry

Why are valence electrons important?

Importance of Valence Electrons. When two atoms approach each other and react with each other, it is their outer shells that come into contact first, and it is therefore the electrons in their outer shells that are normally involved in any chemical reaction.

Posted in Chemistry

Neon has 8 electrons in it's outer shell. Does it need to bond? Why or why not?

No.!!
As it has full filled valence electrons, they can't form bonds, due to lack of vacant electrons.

Hope this helps!

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What do the groups in the periodic table correspond to ?

Number of Valence Elections of the elements in the group.

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If the valence electrons were removed, what would be the ion charge of the element? Na = _____ -1 +1 -3 +3

Sodium (Na) will become Na+

Explanation:

Every atom is neutral in its natural form, meaning they have the same number of protons and electrons. When an electron is removed from an atom, it becomes a cation (positive ion) with a charge of +1. If the atom looses two electrons the new charge of the resulting ion will be +2. On the other hand if an atom gains one electron the resultiong anion (negative ion) will have a charge of -1. Loosing two electrons will form an ion with charge -2.

Posted in Chemistry

What property do atoms of these elements have that helps make the molecules polar

You have not mention here about those elements but the general concept for this is the:
uneven distribution ------> polar
even distribution -------> non-polar

Posted in Chemistry

What particles in an,atom determine an elements atomic number and identity?

"Number of Protons" determines it's Atomic Number & Identity 'cause

Number of Protons = Atomic Number

Hope this helps!

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What is the relationship between where the element is located within a "block" in the Periodic table and the superscripted value (like the exponent) appearing at the end of the electron configuration for an element ?

The space where the element lies (in correspondence with it's own "block") is the number on the exponent.

EXAMPLE:
Carbon is second on it's block, it electronic configuration is 1s^2,2s^2,2p^2
F is fifth on it's block, it electronic configuration is 1s^2,2s^2,2p^5

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What is the relationship between the atomic numbers and ionic radii of the elements in the group 2A? What is the relationship between atomic numbers and first ionization energies? (2A group) Why do these relationships exist? Propose an explanation for each of these relationships. (2A group) Are these relationships consistent with the periodic trends that you have been studying? (2A group)

As the atomic number increases, the ionic radius increases.
As the atomic number increases, the first ionization energy decreases.

These trends both exists because as we proceed down the group, the size of the atom increases due to addition of an electron shell. The increased number of electrons increase the shielding effect, meaning the ion is not held together as tightly, increasing its size, and the outer most electrons are not pulled towards the nucleus as strongly, making it easier to remove them.

Posted in Chemistry

Using the periodic table, which of the following elements has the most properties in common with calcium (Ca)? scandium (Sc) argon (Ar) potassium (K) magnesium (Mg)

atoms are made of 3 types of sub atomic particles; electrons, protons and neutrons

Of these particles, electrons are involved in the chemical reactions.

Therefore chemical properties of the element are determined by the electrons, and that too mostly the valence electrons. Valence electrons are the electrons in the outermost energy shell.

Atoms with same number of valence electrons have similar chemical properties. atoms having same number of valence electrons are classified into groups.

So elements of the same group have same number of valence electrons, hence similar chemical properties

Ca has 2 valence electrons so it belongs to group 2. Of the given elements

only Mg belongs to group 2. Therefore Mg has the most common properties with Ca

Posted in Chemistry

Selenium has six valence electrons. What is the valence of selenium?

The six electrons in the outermost shell allow selenium to have a variety of valence numbers.

The valence of selenium depends on which compound it is in. Selenium is very similar to sulfur. It may have a valence of 6.
EXAMPLE:

selenium hexafluoride SeF6, selenium trioxide SeO3

May have 4;

example

selenium tetrafluoride SeF4, selenium dioxide SeO2

MAy have 2;

example

selenium difluoride SeF2, selenium dichloride SeCl2

and may have -2;

example

hydrogen selenide H2Se

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Potassium and iodine have formed a bond. Prior to this the potassium gave up an electron. It became a _____. positive ion neutral atom negative ion shared ion

Explanation:

Ions are formed when an atom looses or gain electrons.

When an atom looses its electron, it results in the formation of a positive ion which is known as cation and when an atom gains electron, it results in the formation of a negative ion known as anion.

In the question, when potassium gave up an electron, it resulted in the formation of a positive ion which is ion.

Thus, the correct answer is positive ion.

Posted in Chemistry

N which orbitals would the valence electrons for selenium (Se) be placed? s orbital and f orbital s orbital only s orbital and p orbital d orbital only

The atomic number of selenium is 34. It is in the group 16.

The unit digit of the number of the group indicates the number of valence electrons. This is 6.

6 valence electrons means that it has 2 electrons in the s orbital and 4 electrons in the p orbital.

Then the answer is s orbital and p orbital.

You can verify this by searching the electron distribution, which is:

[Ar] 3d10 4s2 4p4

The six electrons in the highest energy level (4), 4s2 and 4 p4 are the valence electrons.

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In terms of the number of valence electrons, describe one cyclic property that can be observed in the model.

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In a periodic table, a set of properties repeats from: A)Element to Element B)Group to group C)Column to column D) Row to row

In a periodic table, a set of properties repeats from Row to row. I guessed it because both B and C have same meaning and A is not correct. So, the answer is D.

Posted in Chemistry

In a molecule of calcium sulfide, calcium has two valence electron bonds, and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium sulfide?