[Chorus]
We are the lanthanoids, or the rare Earth metals
Fifty-seven to seventy-one on the periodic table!

[Verse 1]
I'm lanthanum, my symbol is "La"
My atomic number's fifty-seven and atomic mass is one-thirty-eight
I'm mostly used to make carbon arc lights, don't you know?
Which are used for studio lighting for a motion picture show
Hello there, I am cerium! My symbol is "Ce"
My atomic number's fifty-eight, my atomic mass is one-forty
I am used in motion picture arc lighting as well
I’m also used in flints for lighters, now isn’t that swell!
I'm praseodymium, my symbol is "Pr"
My atomic number's fifty-nine, one-forty's my atomic mass by far
My primary use is as an alloying agent
I make high strength metals used in aircraft engines
I'm neodymium, my symbol is "Nd"
My atomic mass is one-forty-four, my atomic number is sixty
I’m used when making goggles for glass blowers and welders
And I’m used in some glass to make spectrometers
My atomic number's sixty-one, I am promethium
My atomic mass is one-forty-five, and my symbol is "Pm"
I could be used to make a nuclear battery
With a lifespan of five years, that is satisfactory!
[Chorus]
We are the lanthanoids, or the rare Earth metals
Fifty-seven to seventy-one on the periodic table!

[Verse 2]
My atomic number's sixty-two, I am samarium
My atomic mass is one-fifty, my symbol is "Sm"!
I am also used in motion picture arc lighting
I make flints in lighters, now isn’t that exciting!
My atomic number's sixty-three, I'm europium
My symbol is "Eu", my atomic mass is one-fifty-one!
The most reactive of the rare Earth metals, you know?
And I'm a good absorber of neutrons, as scientists show
"Gd" is my symbol, I am gadolinium
My atomic number's sixty-four, my atomic mass is one-fifty-seven
I'm the greatest element known to capture thermal neutrons
And in Nuclear reactors I’m used as control rods
Hi, I'm terbium! My atomic mass is one-fifty-eight
My atomic number's sixty-five, "Tb"'s my symbol, isn't that great!
I was discovered in a quarry in a town called Ytterby
In a country of Sweden, in 1843!
Dysprosium's my name, my atomic number's sixty-six
My symbol's "Dy", one-sixty-two's my atomic mass, mixed
I absorb neutrons and my melting point is high
I’m used in nuclear reactor’s control rods so they don’t fry
I'm holmium, my symbol is "Ho"
Atomic number's sixty-seven, my atomic mass is one-sixty-four
I’m used in magnets for my magnetic properties
My name comes from the Latin word "Holm", as you can plainly see!
My symbol is "Er", I am erbium
Atomic number's sixty-eight, atomic mass is one-sixty-seven
I'm used as a doping agent in fiber optic cables
I am used in the nuclear power industry when able
My atomic number's sixty-nine I am thulium
My atomic mass is one-six-eight, and my symbol is "Tm"
The least abundant of the naturally occurring rare Earth metals
I’ve been used to create lasers, I have one isotope that's stable
I'm ytterbium, my atomic mass is one-seventy-three!
My symbol's "Yb", my atomic number's seventy
I have one isotope that may be used
As a radiation source in a portable x-ray if approved
My symbol is "Lu", I am lutetium
Atomic mass is one-seventy-four, my atomic number's seventy-one
Lutetium’s one of the most difficult elements to prepare
And has little commercial use because I am so rare!
[Chorus]
We are the lanthanoids, or the rare Earth metals
Fifty-seven to seventy-one on the periodic table!