One is silicon, but I don't know the other:(
oxygen
The Earth's crust contains eight elements. The most common element among the eight is Oxygen (47 percent) and second is Silicon (28 percent).
The second most abundant element in the Earth's crust is silicon, comprising 27.8% of the crust by mass.
depends if you're talking about in the earths crust, in water or in the human boby. In us, carbon comes second. In the water, hydrogen. In the atmosphere ther is actually way more nitrogen than there is oxygen.
Oxygen is the most common element in the crust.
The most abundant element in Earth's crust is oxygen, making up about 46.6% of the crust by weight.
The fifth most abundant element in the Earth's crust is potassium. It makes up about 2.6% of the Earth's crust by weight.
Oxygen is the most common element in the crust.
The Earth's crust contains eight elements. The most common element among the eight is Oxygen (47 percent) and second is Silicon (28 percent).
Oxygen is the most common element in the crust.
silicon
Aluminum 7.5 to 8.1%
Siliconsilicon at 28%silicon!