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3 years ago

What element has the electron configuration 1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p2?

Chemistry

2 answers:

Sergeu [11.5K]3 years ago

6 0

Answer:

Lead, Pb

Explanation:

Electron configuration of an element depicts the arrangement or the distribution of electrons in different energy levels (orbitals) within the atom. This arrangement is based on the Aufbau principle which states that the electrons are added such the orbital with the lowest energy gets filled up first.

The given electron configuration is:

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p²

The total number of electrons = 82

For a neutral atom; number of electrons = atomic number(Z)

Based on the periodic table, the element with atomic number = 82 is lead (Pb).

Marina CMI [18]3 years ago

3 0

<span>6s²4f¹⁴5d¹⁰6p²
6 shows that the element is in the 6 period,
6p² shows that the element is in the 14th group. (1 and 2 groups have s -electrons as last ones, 13 group has s²p¹, and 14 group has s²p²)
The element is Pb.

</span>

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3 years ago

If this decay has a half life of 2.60 years, what mass of 72.5 g of sodium 22 will remain after 15.6 years

Vlad1618 [11]

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<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.

Usually, radioactive elements have an unstable atomic nucleus.

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$\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{T/t\frac{1}{2} }}}$

T = duration of decay

t 1/2 = half-life

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How many moles would be equal to 2.6 liters of calcium nitrite

lorasvet [3.4K]

6 moles to equal that I do t know for sure though

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Explanation :

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