Which of the following is least reactive element?
Helium is the least reactive element in the reactive series. Helium is a noble gas. It’s chemical symbol is He and it’s atomic number is 2.
What are the 2 least reactive elements?
Explanation: The reactivity of an element can be determined by looking at the electron configuration of the element. The least reactive elements are those who have a full outermost valence shell ie they have 8 electrons in the outer shell so elements such as helium, neon, radon or the transition elements.
Which are the least reactive metals?
Silver, gold, and platinum are metals with the least reactivity. They are found in nature.
Which is the least reactive non metal?
Helium
Helium is the least reactive non metal. Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert gas.
Which is the least reactive element in reactivity series?
We know that reactivity series is arranged in such a way that as we move from bottom to top, reactivity of the metals increases. As we can see in the series, out of all the given options gold is the least reactive metal.
Which family is the most reactive?
The family that contains the most reactive metals are the alkali metals.
What are the most and least reactive elements?
Reactivity Trend in the Periodic Table
- The most reactive element is fluorine, the first element in the halogen group.
- The most reactive metal is francium, the last alkali metal (and most expensive element).
- The least reactive elements are the noble gases.
Which is the least reactive element in the reactivity series?
What is the most and least reactive metal?
In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom. More reactive metals have a greater tendency to lose electrons and form positive ions ….The reactivity series.
| Element | Reaction with water |
|---|---|
| Lithium | Quickly |
| Calcium | More slowly |
Which family contains the most reactive non metals?
The halogens
The halogens are the most reactive elements; especially fluorine.
What is the least reactive noble gas?
Overview. Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. They include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Noble gases are the least reactive of all known elements, because with eight valence electrons, their outer energy levels are full.
Which is the least reactive metal gold or silver?
In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom….The reactivity series.
| Element | Reaction with dilute acids |
|---|---|
| Copper | Very slowly |
| Silver | Barely reacts |
| Gold | Does not react |