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kap26 [50]
3 years ago
11

What is the valence shell electronic configuration of Alkali Metals , Alkaline Earth Metals, Halogens and Noble Gases?

Chemistry
2 answers:
RideAnS [48]3 years ago
4 0

Answer:

Alkali Metals: 1 valence electron

Alkaline Earth metals: 2 valence electrons

Halogens: 7 Valence electron

Noble Gases: 8 Valence electrons

alisha [4.7K]3 years ago
3 0

Answer:

alkali metals: 1

alkaline earth metals: 2

Halogens: 7

noble gases : 8

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3 years ago
A 175 g piece of iron and a 175 g piece of aluminum are placed in a hot water bath so that they are warmed to 99.7 o C. The meta
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Answer:

The Aluminium sample

Explanation:

From the question,

ΔQ of the iron = Cm(t₂-t₁)........................ Equation 1

Given: C = specific heat capacity of iron, m = mass of iron, t₁ and t₂ = initial and final temperature respectively.

Given: m = 175 g = 0.175 kg, t₂ = 21.5°C, t₁ = 99.7°C

Constant: C = 444 J/kgK.

Substitute into equation 1

ΔQ = 0.175(444)(21.5-99.7)

ΔQ = -6076.14 J

Similarly, for aluminium,

ΔQ' = c'm'(t₂-t₁)...................... Equation 2

Given: m' = 175 g = 0.175 kg,

Constant: 900 J/kgK

ΔQ' = 0.175(900)(21.5-99.7)

ΔQ' = -12316.5 J

Hence the aluminium sample undergoes the greater heat change

6 0
3 years ago
What is Planck's constant ??​
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Planck's constant =

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Explanation:

Step by Step explanation

The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency. Wikipedia

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Answer:

The main group number for an element can be found from its column on the periodic table.

Explanation:

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