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2 years ago

What is the total number of electrons in the valence shell of an atom of aluminum in the ground state?

Chemistry

2 answers:

Gnoma [55]2 years ago

6 0

Answer:

C. 3

Explanation:

If you look at aluminum (Al) in the Periodic Table of the Elements, you will see that its electron configuration is 2-8-3. The last number indicates the valence shell, which contains three electrons.

artcher [175]2 years ago

5 0

The answer is (3) 3. The outer shell of an atom is called valence shell. And the ground state is the lowest energy state of an atom. Aluminum has a electron distribution of 2, 8, 3. So the outer shell has 3 electrons.

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Sodium inside a star is most likely formed by which process?

AURORKA [14]

Answer:

Explanation:

beta emission

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3 years ago

Read 2 more answers

Draw graphs representing Boyle’s law, Charles’s law, and Gay-Lussac’s law for a fixed amount of gas. Make sure that you label ea

dem82 [27]

Answer:

Explanation:

i) represents Boyle s law

ii) represents Charles' law

III) represents Gay Lussacs' law

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3 years ago

Which of the following would increase the volume of a gas?

iVinArrow [24]

According to Ideal Gas Equation, Volume is related to Pressure and Temperature as follow,

P V = n R T
Or,
V = n R T / P

This relation shows that Volume is directly related to Temperature and Inversely related to pressure. So,

A. Chilling a can of soda: As temperature is decreased so the volume will also decrease.

B. Heating a hot-air balloon: As temperature is increased, so Volume will also increase.

C. Squeezing a balloon: As pressure is applied, so volume will decrease.

D. Pressurizing an air tank: Again pressure is applied so volume will decrease.

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3 years ago

Which statement is correct for a plant cell?

Grace [21]

Answer:

the cell membrane is outside the cell wall

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2 years ago

5. A gas at 127०C and 10.0 L expands to 20.0 L. What is the new temperature in Celcius? (HINT: You need to convert to Kelvins so

antoniya [11.8K]

Answer:

The new temperature is 527.15 ºC.

Explanation:

Charles’s law states that the volume of a fixed amount of gas maintained at constant pressure is directly proportional to the absolute temperature of the gas (the absolute temperature is the Kelvin temperature).

We need to calculate the temperature after the expansion, that is T₂. For that, we use Charles' law:

$V₁ ÷ T₁ = V₂ ÷ T₂$

Because we have to use the absolute temperature, we convert ºC to K adding 273.15:

T₁ = 127 ºC + 273.15 ºC = 400.15 K

$T₂ = V₂ × T₁ ÷ V₁$

$T₂ = 20. 0 L × 400.15 K ÷ 10.0 L$

T₂ = 800.3 K

We substract 273.15 to the result to convert it back to ºC:

T₂ = 800.3 - 273.15 = 527.15 ºC.

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3 years ago