When comparing the elemental composition of non-living matter (Earth's crust) and living matter (human body), which of the following elements is found in negligible amounts in the human body but constitutes more than 25% of the Earth's crust by weight?

Step-by-step solution

According to the elemental composition of the Earth's crust and the human body: Carbon constitutes 0.03 % of the Earth's crust and 18.5 % of the human body. Silicon constitutes 27.7 % of the Earth's crust and is present in negligible amounts in the human body. Magnesium constitutes 2.1 % of the Earth's crust and 0.1 % of the human body. Calcium constitutes 3.6 % of the Earth's crust and 1.5 % of the human body. Therefore, Silicon is the element found in negligible amounts in the human body but constitutes more than