Which halogen belongs to the fourth period?
Bromine. Bromine (Br) is an element in group 17 (halogen). It does not exist in elemental form in nature. Bromine is barely liquid at room temperature, boiling at about 330 kelvins.
Bromine is the only element present in period 4 while other elements belong to different periods.
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| Bromine | |
|---|---|
| Atomic number (Z) | 35 |
| Group | group 17 (halogens) |
| Period | period 4 |
| Block | p-block |
Iodine is the halogen element which is present in fifth period while Br and Cl belongs to fourth and third period.
It is a nonmetal, and is one of the few elements that can form diatomic molecules (F2). Chlorine is a halogen in group 17 and period 3. It is very reactive and is widely used for many purposes, such as as a disinfectant.
The symbol of the element in Group 4 and Period 5 is Zr. It is the symbol of Zirconium.
Group 7A (or VIIA) of the periodic table are the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The name "halogen" means "salt former", derived from the Greek words halo- ("salt") and -gen ("formation").
The halogen elements are the six elements in Group 17 of the periodic table. Group 17 occupies the second column from the right in the periodic table and contains fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
Key Takeaways: Halogens
The halogens are the elements in group 17 of the periodic table. This is the next-to-last column of elements on the righthand side of the table. The halogen elements are fluorine, chlorine, bromine, iodine, astatine, and possibly tennessine.
What halogen is in the third period?
Chlorine is a halogen in group 17 and period 3. It is very reactive and is widely used for many purposes, such as as a disinfectant.
It also has the most number of nonmetals, namely five, among all periods. The elements in period 2 often have the most extreme properties in their respective groups; for example, fluorine is the most reactive halogen, neon is the most inert noble gas, and lithium is the least reactive alkali metal.
The group 17 elements include fluorine(F), chlorine(Cl), bromine(Br), iodine(I) and astatine(At) from the top to the bottom. They are called “halogens” because they give salts when they react with metals.
Group 17 elements are called halogens. The name halogens are from Greek halo (sea salt) and gens (producing formation) and thus means 'sea salt former'. Group 17 contains fluorine, chlorine, bromine, iodine which form salts. Hence they are called halogens.
A naturally occurring element, Beryllium is the fourth element on the Periodic Table with the symbol "Be".
The total number of elements present in the 4th period of the modern periodic table is 18.
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Halogen.
| Carbon | |
| Nitrogen | |
| Oxygen | |
| Fluorine | |
| Helium | Neon |
Fluorine is an univalent poisonous gaseous halogen, it is pale yellow-green and it is the most chemically reactive and electronegative of all the elements. Fluorine readily forms compounds with most other elements, even with the noble gases krypton, xenon and radon.
Is chlorine a metal?
Chlorine is the second halogen, being a nonmetal in group 17 of the periodic table.
Fluorine is the most reactive of all the halogens. It combines directly with every other elements except oxygen and some of the noble gases. Hence fluorine is called super halogen element. As the most electro negative element it's extremely reactive.
So hydrogen is neither an alkali metal nor halogen.
Nickel. Nickel (Ni) is an element in group 10.
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Which of the following is NOT a halogen?
| Name of the element | Atomic Number |
|---|---|
| Fluorine | 9 |
The correct answer is Selenium. Selenium is NOT a halogen element.
The total number of elements present in the 4th period of the modern periodic table is 18.
zinc group element, any of the four chemical elements that constitute Group 12 (IIb) of the periodic table—namely, zinc (Zn), cadmium (Cd), mercury (Hg), and copernicium (Cn).
Since according to Pauli's exclusion principle, each orbital, at the maximum, can accommodate two electrons. Therefore, `9` orbitals, at the maximum, can have `18` electrons and hence, fourth period has `18` elements.
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Group 3A.
| 4A | (14) |
|---|---|
| 5A | (15) |
| 6A | (16) |
| 7A | (17) |
| 8A | (18) |