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.
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.
Barium
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.
Fluorine Chlorine Iodine Bromine Astatine
calcium
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.
Calcium, period 4 group 2, very reactive
Bromine is a halogen. The Halogens are very reactive non-metals.
bromine is a halogen (an element that can be very reactive and acidic). similar to inhaling chlorine and fluorine which is even more toxic. this is because bromine has 7 electrons in outermost orbit and capable of stealing 1 electrons from another molecule/atoms/element to achieve a stable octet structure. this makes bromine negatively charge which can cause damage in your body. Bromine does have it's human uses, though. Bromine compounds are used in some medications, and if you've ever swum in a large heated pool, odds are the disinfectant in the water was bromine just as likely as chlorine.
Chlorine is the most reactive gas element. Chlorine is in the halogen family.
Hydrogen is not only the lightest element of all, it is also very reactive.
Germanium is not a very reactive element - the electronegativity is 2,01.
Bromine is a very reactive element, and it will bond easily with any metals in groups 1, 2, and many transition metals. It can also bond covalently with fellow halogens and oxygen, and even carbon under certain circumstances.
Yes, chlorine is very reactive.
Fluorine!
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.