An element with the electron configuration [xe] 6s24f145d7 would belong to which class on the periodic table?

1 answer:

8 0

If the atom is neutral then, the total number of electrons is the same as the number of protons. We calculate for the total number of electrons given the compressed electron configuration,
number of electrons of Xenon (Xe) = 54
The total number of electrons after Xenon,
= 2 + 14 + 7 = 23

Adding up all the number of electrons, we have,
total number of electrons = 54 + 23 = 77

The identity of this element is Iridium (Ir). This element belongs to the class of Group 9. This is the transition metal.

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A and B react together in this reversible reaction. A + 3B --> C + 2D. A mixture of 10 mol of A and 10 mol of B were left to

alexira [117]

Not multiple choice?

4 0

4 years ago

PLEASE HELP!!

NARA [144]

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As water being amphoteric in nature can react with HCl as follow,

HCl + H₂O ⇆ H₃O⁺ + OH⁻

In this case no salt is formed, so we can skip this option.

Ammonia being a weak base can abstract proton from HCl as follow,

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3 0

3 years ago

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What is the frequency of the light with a wavelength of 4.90x10^-7 m

docker41 [41]

Answer: $6.12\times 10^{14}$ Hz

Explanation: Recall the formula for the speed of light is

$c=\lambda v$

where $c$ is the speed of light, $\lambda$ is the wavelength, and $v$ is the frequency. Assuming this takes place in a vacuum, $c=3.00\times 10^8$ m/s. Now we can solve for frequency