Which of the following metals burn with brick red flame?

Calcium (Ca) burns with a brick red flame. When a metal burns, it reacts with oxygen in the air to form a metal oxide. The color of the flame depends on the energy released during the reaction, which can vary depending on the metal. Calcium has a relatively low ionization energy, meaning it requires less energy to remove an electron from its outermost shell compared to other metals such as lead (Pb), sodium (Na), and magnesium (Mg). When calcium reacts with oxygen in the air, it releases a relatively large amount of energy, resulting in a bright, brick red flame. In contrast, lead, sodium, and magnesium have higher ionization energies, meaning they require more energy to remove an electron from their outermost shells. As a result, their reactions with oxygen release less energy and produce flames of different colors. In summary, calcium burns with a brick red flame because it has a relatively low ionization energy and releases a large amount of energy when it reacts with oxygen in the air.