It's Chlorine because they are in the same group in the periodic table.
Chlorine is the most reactive gas element. Chlorine is in the halogen family.
The periodic table is designed so elements in the vertical columns (groups) have the most similarities in chemical and physical properties. So, Iodine is most similar to the other non-metals in the Halogen family, such as Fluorine, Chlorine, Bromine, and Astatine.
Unstable non- metal It is diatomic as well, meaning it exist in nature as 2 atom (Br2). It is also very reactive as it is a halogen. It is a brown liquid at room temperature and pressure.
Fluorine Chlorine Iodine Bromine Astatine
Magnesium is an Alkaline Earth element. It is a metal, and is very reactive.
The element that fits this description is chlorine, which is a highly reactive halogen with properties similar to those of magnesium. Chlorine is located in the same period as bromine (Group 17, Period 4) in the periodic table.
Bromine is an element, a very very reactive element. At standard temperature and pressure it is a brown colored liquid, as seen in the center vial in the image above. However bromine is so reactive that you will never see it in its elemental form in daily life, it is most commonly is found in compounds called bromide salts.
No, Bromine is not brittle at room temperature, as Bromine is one of only two elements in the Periodic Table that is a liquid at room temperature.
Bromine is a halogen. The Halogens are very reactive non-metals.
The metal you are referring to is likely calcium. It is in the same period as bromine (period 4) and exhibits similar properties to magnesium due to their shared group (group 2) characteristics, such as reactivity and metallic nature.
The metal you're describing is likely calcium. It is a highly reactive metal that shares similar propertieswith magnesium, as they are both alkaline earth metals in the same period of the periodic table as bromine.
Hydrogen is not only the lightest element of all, it is also very reactive.
Germanium is a moderately reactive element, similar to silicon, but less reactive than metals like sodium or magnesium. It reacts slowly with air, forming a surface oxide layer, and it reacts with halogens to form germanium halides.
Chlorine
Chlorine.
The most reactive non-metal is fluorine. It is often nicknamed the 'Tyrannosaurus Rex' of the elements because of its reactivity. NB . Oxygen ,which we breath, is also a very reactive element. If it wasn't so reactive we would probably die.
There are many examples. Ni is a example element.