The most abundant element in Earth’s Crust and Mantle isGroup of answer choicesIronOxygenSiliconAluminum

Which of the following elements is the most abundant in Earth's crust?Group of answer choicesCarbonIronOxygenSilicon

The dominant element in the Earth’s crust is:Group of answer choicesSilicaOxygenIronPotassiumSilicon

What is the most abundant element on the Earth?Group of answer choicescalciumoxygenaluminumsilica

The second most abundant element in the Earth is Group of answer choicesIron.Oxygen.Silicon.Aluminum.

The most abundant element (by mass) in the human body is :Group of answer choicesPotassium (K)Nitrogen (N)Oxygen (O)Carbon (C)