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iren [92.7K]
3 years ago
11

The electrons in an atom's outermost energy level are called: Electron dots. Quantum electrons. Valence electrons. Noble-gas ele

ctrons.​
Chemistry
1 answer:
Flauer [41]3 years ago
3 0

The valence electrons are located in an atom's outermost energy level

<h3>Further explanation  </h3>

In an atom, there are levels of energy in the shell and subshell  

This energy level is expressed in the form of electron configurations.  

Electrons fill the orbitals based on the Aufbau principle, namely the filling of electrons starts from the lowest energy level

  • Electron dots

Usually used in describing Lewis structures, placed around the element

  • Quantum electrons

Each orbital in an atom consists of 4 quantum numbers  : n, l, ml, ms

Each electron has a different quantum number and this conforms to Pauli's rule: no electrons have the same 4 quantum numbers

  • Valence electrons

Valence electrons are electrons used in a chemical bond , and  in an atom's outermost energy level

  • Noble-gas electrons

Noble gas has a stable electron configuration of 8 valence electrons which guides the formation of chemical bonds called the octet rule

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A same of gas in a rigid container is at 25.0Cand 1.00atm. What is the pressure of the sample when heated to 220.0C
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Answer:

1.654 atm.

Explanation:

  • We can use the general law of ideal gas: <em>PV = nRT.</em>

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R  is the general gas constant,

T is the temperature of the gas in K.

  • If n and V are constant, and have different values of P and T:

<em>(P₁T₂) = (P₂T₁)</em>

<em></em>

  • Knowing that:

P₁ = 1.0 atm, T₁ = 25°C + 273 = 298 K,

P₂ = ??? atm, T₂ = 220°C + 273 = 493 K,

  • Applying in the above equation

<em>(P₁T₂) = (P₂T₁)</em>

<em></em>

<em>∴ P₂ = (P₁T₂)/(T₁) </em>= (1.0 atm)(493 K)/(298 K) = <em>1.654 atm.</em>

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3 years ago
Which weighs more?
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What is the pH of a solution with an H3O+ concentration of 5.67 x 10-4 M?
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Answer:

<h2>3.25 </h2>

Explanation:

The pH of a solution can be found by using the formula

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From the question we have

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We have the final answer as

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Hope this helps you

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