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Carbon
Helium is not one of the 8 most common elements in Earth's continental crust. The 8 most common elements are oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. Helium is a noble gas and is not as abundant in Earth's crust compared to these elements.
The common name for Group 1 elements is alkali metals. These elements include lithium, sodium, potassium, rubidium, cesium, and francium, and they are highly reactive with water.
The most common elements in soil are oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, and hydrogen. These elements play important roles in soil fertility, structure, and nutrient availability for plant growth.
-2
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Silver
Both are transition metals or d-block elements.
Both Ni and Tc are d-block elements (or transition metal elements)
Nickel (Ni) and Technetium (Tc) are both transition metals in the periodic table. They are elements that can exhibit multiple oxidation states and are commonly used in various industrial applications, such as in catalysts and electronic devices.
Silver
Both Ni and Tc are d-block elements (or transition metal elements)
they are both a metal and a solid
Silver
Silver
Both are transition metals and have a valency of 2.