Question

Name the metal present in the following.
1.Hemoglobin
2.Chalk
3.Chlorophyll
4.Chocolate wrappers

Answer 1

We must have to remember that metals are the elements that can lose their electrons easily. Metals are generally lustrous, malleable and ductile. They are good conductor of heat and electricity. And usually they have high boiling point and melting points. Metals form a coordination complex.

Complete answer:
The metal that is present in Hemoglobin is iron. The heme group (a component of the hemoglobin protein) is a metal complex, with iron as the central metal atom that can bind or release molecular oxygen. Iron is an essential element for blood production. About 70 percent of your body's iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin.
The metal that is present in chalk is Calcium. Main element present in chalk is Calcium. The composition of chalk is $CaC{O_3}$ Main element present in Chlorophyll is magnesium. The central metal atom is Magnesium and organic molecule around it is known as porphyrin
The metal that is present in chlorophyll is magnesium. Chlorophyll or leaf green is a porphyrin derivative with magnesium as the central atom and is hence a metal complex dye. It is present in the chloroplasts in all green parts of plants as a mixture of blue green chlorophyll a and yellow green chlorophyll b, and constitutes the catalyst for photosynthesis.
The metal that is present in chocolate wrappers is aluminum. Main element in Chocolate wrappers is Aluminum. The wrapper is mainly aluminum foil.

Note:
We also need to know that the main element in hemoglobin is a metal complex, with iron as the central metal atom that can bind or release molecular oxygen. Main element present in chalk is Calcium. Element present in chlorophyll is magnesium. The main element present in chocolate wrappers is aluminium.