Which Group Has Least Reactive Elements?

Why does Group 7 get less reactive?

The reactivity of Group 7 elements decreases down the group.

The electrons in the outer shell move further away from the nucleus as we go down the group and the attraction force between the electrons and the nucleus become weaker and weaker.

This weaker attraction in the larger atoms makes it harder to gain electron..

Which group is least reactive?

Noble GasesGroup 18: Noble Gases Group 18 elements are nonmetals called noble gases (see Figure below). They are all colorless, odorless gases. Their outer energy level is also full, so they are the least reactive elements.

Which group in the periodic table is not reactive?

noble gasesThe noble gases are found in group 18 of the periodic table. These elements have an oxidation number of 0. This prevents them from forming compounds readily. All noble gases have 8 electrons in their outer shell, making them stable and highly non-reactive.

Which metal group is least reactive?

noble gasesThe noble gas group is the group of elements that are the least reactive. The noble gases are the last column on the right side of the periodic…

What is the most reactive metal group?

CaesiumCaesium, the fifth alkali metal, is the most reactive of all the metals. All the alkali metals react with water, with the heavier alkali metals reacting more vigorously than the lighter ones.

Which family in the periodic table is most reactive?

alkali metals1 Answer. The most reactive metals in the periodic tables are the alkali metals, followed by the alkaline earth metals.

What’s the most reactive element in Group 7?

FluorineFluorine is the most reactive element of all in Group 7. You can see the trend in reactivity if you react the halogens with iron wool.

Why Fluorine is the most reactive element in Group 7?

Open Yenka file Model 2. Fluorine is the most reactive element in Group 7, and is even more reactive than chlorine. … Fluorine’s outer shell is closer to the nucleus and has fewer filled shells between it and the nucleus, so the attraction for a new electron is greater and so it can gain an extra electron more easily.

Is gold the most reactive metal?

Out of the given metals potassium is the most reactive metal as it reacts violently with water, it can react with moisture present in air. … Gold is an inert metal and iron reacts with hot water or steam only.

Is Potassium a reactive metal?

Pure potassium is a highly reactive metal. Exposed to water, it explodes with a purple flame, so it’s usually stored under mineral oil for safety. Because it’s so reactive, potassium isn’t found free in nature, according to the Jefferson National Linear Accelerator Laboratory.

Why is gold and silver least reactive?

Silver and gold is a good conductor of electricity because of its sea of delocalised electrons between the layers of metal ions. However it is not highly reactive because you would need a lot of energy to break the metallic bonds within each of those layers.

Which is less reactive gold or platinum?

Metals which are higher in the electrochemical series displace metals which are lower. Hydrogen has an electrode potential of +0.00. As to which is more reactive platinum or gold the answer is platinum with an electrode potential of +1.18 while gold has an electrode potential of +1.70.

How can you tell which metal is more reactive?

The primary difference between metals is the ease with which they undergo chemical reaction. the element towards the bottom left corner of the periodic table are the metals which are most reactive.

Which elements are more reactive?

Reactivity Trend in the Periodic TableThe 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.More items…•

What is the least reactive element in Group 7?

Revision notes on the topic ‘Group 7: Reactivity’ for Edexcel IGCSE ChemistryReactivity of Group 7 non-metals increases as you go up the group.Out of the 3 halogens, chlorine, bromine and Iodine, chlorine is the most reactive and iodine is the least reactive.

Which element is least chemically reactive?

Noble gasesNoble gases are the least reactive of all known elements. That’s because with eight valence electrons, their outer energy levels are full. The only exception is helium, which has just two electrons.

What makes an element reactive?

The number of electrons in the outermost shell of an atom determines its reactivity. … Halogens are highly reactive because they readily gain an electron to fill their outermost shell. Alkali metals are highly reactive because they readily lose the single electron in their outermost shell.

Is potassium more reactive than sodium?

As potassium is larger than sodium, potassium’s valence electron is at a greater distance from the attractive nucleus and is so removed more easily than sodium’s valence electron. As it is removed more easily, it requires less energy, and can be said to be more reactive.