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2 years ago

Based on its location on the periodic table, how many electrons does oxygen have in its outer energy level?

Chemistry

2 answers:

amm18122 years ago

5 0

It’s 6 because each oxygen atom has 6 valence electrons

Simora [160]2 years ago

4 0

Answer:

The number of electrons in the outer energy level of oxygen is 6.

Explanation:

Oxygen is present in the group 16 of the periodic table. The electronic configuration of group 16 element is $ns^{2}np^{4}$ . The number of electrons in outer energy level of group 16 element is always found to be 6.

The addition of the number of the electrons present in the valence shell orbitals of oxygen will give the total number of electrons present in the outer energy level.

The number of electron in the outer energy level of oxygen is (2 + 4) = 6.

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A 6.1-kg solid sphere, made of metal whose density is 2600 kg/m3, is suspended by a cord. When the sphere is immersed in a liqui

deff fn [24]

Answer:

Density of the liquid = 1470.43 kg/m³

Explanation:

Given:

Mass of solid sphere(m) = 6.1 kg

Density of the metal = 2600 kg/m³

Thus volume of the liquid :

$Volume(V)=\frac{Mass(m)}{Density (\rho)}$

Volume of the sphere = 6.1 kg/2600 kg/m³ = 0.002346 m³

The volume of water displaced is equal to the volume of sphere (Archimedes' principle)

Volume displaced = 0.002346 m³

Buoyant force = $\rho\times gV$

Where

$\rho$ is the density of the fluid

g is the acceleration due to gravity

V is the volume displaced

The free body diagram of the sphere is shown in image.

According to image:

$mg=\rho\times gV+T$

Acceleration due to gravity = 9.81 ms⁻²

Tension force = 26 N

Applying in the equation to find the density of the liquid as:

$6.1\times 9.81=\rho\times 9.81\times 0.002346+26$

$33.841=\rho\times 9.81\times 0.002346$

$\rho=\frac{33.841}{9.81\times 0.002346}$

$\rho=1470.43 kgm^3$

<u>Thus, the density of the liquid = 1470.43 kg/m³</u>

6 0

3 years ago

Why does a star expand into a red giant?

devlian [24]

Answer:

"Hydrogen is still available outside the core, so hydrogen fusion continues in a shell surrounding the core. The increasingly hot core also pushes the outer layers of the star outward, causing them to expand and cool, transforming the star into a red giant."

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2 years ago

Chemical weathering occurs faster in warm, tropical climates, although it happens in cold climates as well. Describe some condit

andrew11 [14]

Oxidation, Dissolving in acid, Hydrolysis ,Water absorption and Hydration

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2 years ago

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n200080 [17]

Answer:

Explanation:

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2 years ago

Why does Al have a larger atomic radius than B

Valentin [98]

Explanation:

While atomic radii DECREASE across a Period, a row of the Period Table, from left to right as we face the Table, atomic radii INCREASE down a Group, a column of the Periodic Table, due to the shielding of the valence electrons by the closed valence shell(s) that intervenes between the nucleus and the valence, outermost electrons.

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2 years ago