Arrangement of Electrons in the Atom Questions Flashcards
Why might the electron in a hydrogen atom not occupy the n=1 energy level?
It is in an excited state/gained energy/absorbed a photon
What colour light is associated with the electron in a hydrogen atom moving from n=3 to n=2
red
Name the series of lines visible in the hydrogen emission spectrum
Balmer Series
How many sub levels are associated with the n=3 energy level?
3
What is an atomic orbital?
It is a region in space within which there is a high probability of finding an electron
How many orbitals are associated with the n=2 energy level?
4
a single 2s orbital, and three orbitals labeled 2p
What is the maximum number of electrons that can occupy the n=3 energy level in a multi-electron atom?
18=2+8+8
Write electron configuration for beryllium, neon and krypton
1s^2, 2s^2
1s^2, 2s^2, 2p^6
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^10, 4s^2, 4p^6
Why are the elements krypton and neon chemically inert?
They have stable full outer octet (ns^2 np^6) electrons
/
8 electrons in outer shell (energy level) is stable
Why are the elements beryllium and magnesium reactive?
They do not have stable full outer octet (ns^2 np^6) electrons
/
do not have 8 electrons in outer shell (energy level) is stable
Why is the element magnesium more reactive than beryllium?
Mg has a greater atomic radius, it has more energy levels
outer electrons of Mg are further from nucleus
What term is used to refer to the condition of the hydrogen atom when its electron occupies the E1 level?
Ground state
What term is used to refer to the condition of the hydrogen atom when its electron occupies any of the levels E2, E3, ect?
Excited state(s)
What causes the electron to leave the E1 level?
It gains energy/it is heated/ an electric current is passed through it/ it absorbs a photon
Why does the electron not remain in any of the levels E2, E3, etc?
Higher energy levels unstable
