Question Video: Stating the Most Abundant Transition Element in the Earth’s Crust | Nagwa Question Video: Stating the Most Abundant Transition Element in the Earth’s Crust | Nagwa

Question Video: Stating the Most Abundant Transition Element in the Earth’s Crust Chemistry • Third Year of Secondary School

What is the most abundant transition element in Earth’s crust?

02:50

Video Transcript

What is the most abundant transition element in Earth’s crust?

The Earth has several distinct layers. The innermost portion is the inner core. Next is the outer core. Third is the mantle layer. And the outer layer is the crust. We are asked about the most abundant transition element in this crust layer.

The periodic table is divided into sections. The blocks shown in pink are the transition metals and the inner transition metals. The last group of the d block, which is shaded here, are not technically transition metals according to the IUPAC definition. But many scientists loosely refer to these as transition elements too. We won’t look at this definition here. Let’s rather focus on identifying which of these elements is the most abundant in Earth’s crust.

The two most abundant elements in Earth’s crust are oxygen followed by silicon. These are not transition elements. Next come aluminum, iron, calcium, then sodium. Iron is a transition metal. Then, we have even smaller amounts of magnesium. And the last portion of this pie chart is a combination of various elements, including titanium and hydrogen. Titanium is a transition element. All other elements, including other transition elements, are too rare to even show as a slice on this chart.

Thus, the most abundant transition element in the Earth’s crust is iron. Iron is mechanically robust. It is used in economically important alloys, such as steel. Iron is also one of the most abundant chemical elements in the solar system, as it forms in the final stages of silicon burning in stars. And scientists speculate that most solid planets have a high content of the element iron. And they know that there is lots of iron in other layers of the Earth too.

We should appreciate, however, that iron is rarely present in the Earth in its elemental or pure form. It is usually found in iron-containing ores, such as hematite.

Finally, we have seen that the top three most abundant elements, oxygen, silicon, and aluminum, are not transition elements. And we have seen that the fourth most abundant element in the crust is iron, which is a transition element. So which is the most abundant transition element in Earth’s crust? The answer is iron.

Join Nagwa Classes

Attend live sessions on Nagwa Classes to boost your learning with guidance and advice from an expert teacher!

  • Interactive Sessions
  • Chat & Messaging
  • Realistic Exam Questions

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy