Consider neutral molybdenum atoms. On the periodic table, molybdenum is shown as 42 Mo 95.94

Consider neutral molybdenum atoms. On the periodic table, molybdenum is shown as

42 Mo 95.94

a. Based on the info provided above, what is the most abundant isotope of molybdenum?

b. How many protons and neutrons are there in the nucleus of this isotope?

c. Write the electron configuration of a neutral molybdenum atom, first in full, and then using the shorthand form. (Give the expected e- configuration).

d. How many valence electrons does a neutral molybdenum have?

Solutions

Expert Solution

a) Molybdenum-100 is the only naturally occurring isotope that is not stable. Molybdenum-100 has a half-life of approximately 1×10¹⁹ y and undergoes double beta decay into ruthenium-100. Molybdenum-98 is the most common isotope, comprising 24.14% of all molybdenum on Earth. Molybdenum isotopes with mass numbers 111 and up all have half-lives of approximately .15 µs

b) according to it's atomic number, it has 42 protons. Now, for the number of neutrons:

#N = 95 - 42 = 53 neutrons.

c) and d)

[Mo] = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁵

[Mo] = [Kr] 4d⁵ 5s¹ With one electron of valence.

queen_honey_blossom answered 1 year ago

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