Question

Порівняти металічні властивості 20 і 56 елементів

Answer 1

Объяснение:

20-Са

56-Ва

металлические свойства сверху вниз в ПСХЭ усиливаются

А значит металлические свойства Ва сильнее

Answer 2

Comparing the Metallic Properties of Elements 20 and 56

When comparing the metallic properties of elements 20 and 56, it's important to consider their respective characteristics.

Element 20 (Calcium): - Calcium is a chemical element with the symbol Ca and atomic number 20. - It is a fairly reactive metal that forms a dark oxide-nitride layer when exposed to air. - Calcium has a silvery-white appearance when freshly cut. - It is an essential element for living organisms, particularly in cell physiology, and it is the most abundant metal in the human body.

Element 56 (Barium): - Barium is a chemical element with the symbol Ba and atomic number 56. - It is a soft, silvery alkaline earth metal. - Barium is never found in nature in its pure form due to its reactivity with air, but its compounds are used in a variety of industries. - It is used in various applications, including in the production of vacuum tubes, as a deoxidizer for copper, and in the manufacture of rubber.

Comparison: - Both calcium (element 20) and barium (element 56) belong to the group of alkaline earth metals in the periodic table. - They exhibit similar metallic properties due to their group placement, such as being relatively reactive and having a silvery appearance when freshly cut. - However, barium is generally more reactive and has a lower melting point compared to calcium.