# In what way are the electron configurations of H, Li, Na, K, Rb, and Cs similar? More than one...

## Question:

In what way are the electron configurations of H, Li, Na, K, Rb, and Cs similar? More than one answer is possible.

a. They belong to a mathematical progression in atomic number such that *Z* + 8 describes the next atomic number.

b. They all have an unpaired electron in an *s* orbital.

c. They all have an unpaired electron with a magnetic quantum number, *m*{eq}_l
{/eq} = 0.

d. They all have an unpaired electron with an angular momentum quantum number, *l* = 0.

e. They all have an unpaired electron with a spin magnetic quantum number, *m*{eq}_s
{/eq} = +1/2.

f. They an have an unpaired electron with a spin magnetic quantum number, *m*{eq}_s
{/eq} = - 1/2.

## Quantum Numbers & Electronic Configuration:

The set of four quantum numbers of a particular electron in an atom is unique. The principal quantum number *n* can have the values 1, 2, 3 and so on.

The Azimuthal quantum number *l* can have the values between 0 and (*n* - 1).

The magnetic angular momentum quantum number *m*{eq}_{l}
{/eq} can have the values between -*l* and +*l*.

The magnetic spin quantum number can have the values -1/2 or +1/2.

## Answer and Explanation: 1

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View this answer- Statement (a) is false because there is a gap of 18 or 36 elements between some of the elements of this group of elements.
**Statement (b) is true**as...

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Chapter 47 / Lesson 8What are electron configuration orbitals? Learn about the s, p, and d orbital electrons, and use the periodic table to understand orbitals and placement.