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Lerok [7]
3 years ago
13

The amount of energy needed to raise one gram of a substance one degree Celsius is a characteristic property known as

Chemistry
2 answers:
natita [175]3 years ago
5 0

Answer : The amount of energy needed to raise one gram of a substance one degree Celsius is a characteristic property known as, Specific heat capacity.

Explanation:

Heat capacity : It is defined as the heat required to raise the temperature by one degree.

Specific heat capacity : It is defined as the amount of heat required by one gram of a substance to raise its temperature by one degree Celsius.

The heat required to change the temperature of a substance is related to heat capacity of the substance by the expression as :

C=\frac{q}{m\times \Delta T}

where,

C = specific heat capacity

m = mass of a substance

q = heat required

\Delta T = change in temperature of substance

Hence, the amount of energy needed to raise one gram of a substance one degree Celsius is a characteristic property known as, Specific heat capacity.

inna [77]3 years ago
4 0
The answer is heat capacity.
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The electron configuration for sodium ion Na⁺ : <u>(2) 2-8</u>

<h3>Further explanation </h3>

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

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

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is

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Charging electrons in the sub shell uses the following sequence:

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Determination of electron configurations based on principles:

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• 2 Hund: electrons fill orbitals with the same energy level

• 3. Pauli: no electrons have the same 4 quantum numbers

The alkali metal Na will release electrons to form Na + so that the electron configuration is stable as the noble gas element Ne

electron configuration Ne: [He] 2s² 2p⁶

Na electron configuration: [Ne] 3s¹

electron configuration Na + = [Ne] = [He] 2s² 2p⁶

The maximum number of electrons in the shell K, L, M, N

According to Bohr, the maximum number of electrons that can occupy each atomic shell can be calculated by the formula 2n²

  • K shell (n = 1): 2.1² = 2 electrons
  • L shell (n = 2): 2. 2² = 8 electrons
  • M shell (n = 3): 2. 3² = 18 electrons
  • N shell (n = 4): 2. 4² = 32 electrons

If we look at the configuration of the Na⁺ ion:

1s² 2s² 2p⁶ then

on the shell n=1 (1s) there are 2 electrons

on the shells n=2 (2s and 2p) there are 8 electrons

So that the configuration

Na⁺ = 2-8

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