Do elements in a period share chemical properties?
All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor. Arranged this way, groups of elements in the same column have similar chemical and physical properties, reflecting the periodic law.
Why are the elements in Group 1 the most reactive?
Elements in the same group of the periodic table have the same number of valence electrons. These are the electrons in their outer energy level that can be involved in chemical reactions. All the elements in group 1 have just one valence electron. This makes them very reactive.
Which element in Group 17 is most reactive?
fluorine
Which element is the most active in Group 17?
Fluorine
Which property increases down Group 17?
Halogens are nonmetals in group 17 (or VII) of the periodic table. Down the group, atom size increases. As a diatomic molecule, fluorine has the weakest bond due to repulsion between electrons of the small atoms. Due to increased strength of Van der Waals forces down the group, the boiling points of halogens increase.
Which element is the most active?
Lithium
What is the special name given to the 17th group?
Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
What is the special name given to group 17 elements and why?
Group 17 elements are called halogens. The name halogens are from Greek halo (sea salt) and gens (producing, forming) and thus means ‘sea salt former’.
What is the other name for group 18th elements?
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
What are Group 16 elements called?
Oxygen group element, also called chalcogen, any of the six chemical elements making up Group 16 (VIa) of the periodic classification—namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv).
Why is 18th group called Zero group?
(a) Elements of group 18 have their outermost shell completely filled. So, they neither gain electron nor lose any electron and hence have zero valency. Thus, they are called zero valent.
What is meant by zero group?
: the group of inert gases having a valence of zero in the periodic table.
What is the special feature of 18th group of periodic table?
The noble gases are a group of chemical elements that make up Group 18 on the periodic table. These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity.
What are the properties of Group 18 elements?
The Noble Gases (Group 18)
- Noble gases are colorless, odorless, tasteless, and nonflammable gases under standard conditions.
- In the periodic table, the noble gases are arranged according to their boiling point.
- Noble gases are widely used in different fields, from incandescent lighting to excimer lasers.
Which is better nitrogen or argon?
Argon is a denser gas than nitrogen, and an industrial application purged using argon will keep moisture and oxygen out more effectively as a result. Its molecules will disperse less easily than with nitrogen.
How many nitrogen gas is taken from the atmosphere?
Air is mostly gas It’s a mixture of different gases. The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.
Why is nitrogen an inert gas Class 12?
Nitrogen is inert because its p-subshell is half-filled due to it has maximum exchange energy. Thus it is exists in stable form as like inert gas and it form triple bond (N≡N). N2 molecules is very stable and its dissociation energy is 225kcal/mol.