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Chemistry class review

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True or false (justify): An orbital is a two-dimensional region where an electron is the 90-95% of times.

False, because...

Complete: every atom is divided into: level (shell), __________, and orbitals.

sublevel (or subshell)

There are 4 quantum numbers. They are:

n, l, m, s.

This quantum number specifies the energy level where an orbital is located.

n (principal quantum number)

This quantum number specifies the shape of an orbital and is basically the path to follow for an electron.

l (angular momentum quantum number)

This quantum number represents the orientation of the orbital

m (Magnetic quantum number)

This quantum number represents the direction the electrons move around their own axis.

s (Spin quantum number)

Possible values of n

1,2,3,4,5,6,7

Possible values of quantum number "l"

0,1,2,3 (s,p,d,f)

Possible values of quantum number "m"

-3,-2,-1,0,1,2,3

Possible values of The spin quantum number

-1/2, +1/2

Complete: the electrons have 2 states: the _______ state, and the _______ state.

ground state and excited state.

In electron configuration, what does the Hund's rule indicates?

The electrons must be drawn first unpaired and then paired, because they have repulsion forces and will first occupy empty orbitals

In electron configuration, what does the Pauli's exclusion principle indicates?

The position of electrons within an atom cannot be the exact same (at least 1 quantum number's value will be different)

True or false: The positions in the Aufbau diagram indicate the orbitals in an atom

True!🥸☝️

Do atoms are more stable separated or bonded to another atoms?

When they are bonded.