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Stells [14]
3 years ago
14

Which of the following best describes the noble gases​?

Chemistry
1 answer:
never [62]3 years ago
6 0
<h3><u>Answer;</u></h3>

A. have a full outer electron shell

<h3><u>Explanation</u>;</h3>
  • Noble gases are elements that are found in Group 18 of the periodic table. They include, Neon, Argon, Krypton, Xenon, etc.
  • <em><u>The outer shell of valence electrons is considered to be “full” in noble gases, giving them little tendency to participate in chemical reactions. This means they have an octet configuration.</u></em>
  • They are all monatomic gases under standard conditions, including those with larger atomic masses than many other elements that are solids under standard conditions.
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What shape are all molecules that contain only two atoms?
Ksju [112]
A. Linear would be the answer
Good luck
8 0
4 years ago
Read 2 more answers
How does the difference in electronegativity values determine the type of bond that occurred? Ionic or covalent
Alenkasestr [34]
The more electronegativity atom attracts electrons more strongly and gains a slightly negative charge, the less electronegative atom has a slightly positive charge.
8 0
4 years ago
Which of the following equations can be used to determine the change in enthalpy of a system?
jonny [76]

Which of the following equations can be used to determine the change in enthalpy of a system

ΔHreaction=ΔHproducts−ΔHreactants

5 0
4 years ago
How many liters of hydrogen gas will be produced at STP from the reaction of 5.159 x 1021 atoms of magnesium with 55.23 g of pho
shtirl [24]

Answer:

0.190L of hydrogen may be produced by the reaction.

Explanation:

Our reaction is:

3Mg + 2H₃PO₄ →  Mg₃(PO₄)₂ + 3H₂

We need to determine the limting reactant. Let's find out the moles of each:

5.159×10²¹ atoms . 1 mol / 6.02×10²³ atoms = 0.00857 moles of Mg

55.23 g . 1 mol / 97.97 g = 0.563 moles of acid

2 moles of acid react to 3 moles of Mg

0.563 moles of acid may react to: (0.563 . 3) /2 = 0.8445 moles of Mg

Definetely the limting reactant is Mg.

As ratio is 3:3, 3 moles of Mg can produce 3 moles of hydrogen

Then, 0.00857 moles of Mg must produce 0.00857 moles of H₂

At STP, 1 mol of any gas occupies 22.4L

0.00857 mol . 22.4L / 1mol = 0.190L

3 0
3 years ago
Which of the three has the largest ei1? which of the three has the largest ? 1s22s22p63s23p64s1 1s22s22p63s23p5 1s22s22p63s23p1?
coldgirl [10]

E_i1 will be largest for 1s^22s^22p^63s^23p^5.

Explanation: Ionization energy is the energy to knock off an electron from a gaseous atom of ion. First ionization energy or E_i1 is the energy required to remove 1 loosely held electron from 1 mole of gaseous atoms to produce 1 mole of gaseous ion carrying (+)1 charge.

M(g)\rightarrow M^+(g)+e^-

The electrons are filled according to Aufbau's rule and the orbitals which are strongly held to the nucleus follows the order s>p>d>f.

Electron is released from the outermost shell that is from the electrons which are loosely held to the nucleus, this follows the pattern s.

In configurations, 1s^22s^22p^63s^23p^64s^1,1s^22s^22p^63s^23p^5\text{ and } 1s^22s^22p^63s^23p^1

The loosely held orbital is 4s, therefore electron will be lost from that easily.

Now, in 3p orbital, one configuration has 5 electrons and one has 1 electron.

The configuration having 5 electrons will be more tightly held by the nucleus because it has more electrons that the one having only 1 electron. Hence, the electron will be lost easily from the configuration having 3p^1 as the valence shell.

Therefore, the configuration 1s^22s^22p^63s^23p^5 will the largest E_i1.


8 0
3 years ago
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