Question: Which Elements Have A Complete Outer Shell?

What family would you classify radium?

alkaline earth metalsThe alkaline earth metals are six chemical elements in group 2 of the periodic table.

They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)..

How many electrons are in K shell?

2 electronsTherefore, the K shell, which contains only an s subshell, can hold up to 2 electrons; the L shell, which contains an s and a p, can hold up to 2 + 6 = 8 electrons, and so forth; in general, the nth shell can hold up to 2n2 electrons.

Why are shells named KLMN?

The names of the electron shells come from a fellow named Charles G. Barkla, a spectroscopist who studied the X-rays that are emitted by atoms when they are hit with high energy electrons. … This innermost shell is now called the K-shell, after the label used for the X-ray.

How do you tell if an element has a complete outer shell?

The properties of an element are determined by its outermost electrons, or those in the highest energy orbital. Atoms that do not have full outer shells will tend to gain or lose electrons, resulting in a full outer shell and, therefore, stability.

In what family would you classify hydrogen?

In what family would you classify hydrogen? Explain your choice. Alkali Metals – Hydrogen has only one valence electron so it could be classified with the alkali metals. OR Halides – Hydrogen only needs one more valence electron to fill its outer shell so it could be classified with the halides.

Does hydrogen have a full outer shell?

If Hydrogen has 1 electron it can only have 1 outer shell (or orbital) as an electron cannot by split across shells. … Consequently, hydrogen only has 1 outer shell as it has less than 2 electrons so it does not need another shell.

Which elements have 3 electrons in their outer shell?

ElectronsAtomic NumberElementEnergy Levels or “shells”2Helium (He)3Lithium (Li)14Beryllium (Be)25Boron (B)337 more rows

How many electrons are on the outer shell of oxygen?

6 valence electronsOxygen is column 16 of the periodic table along with elements like sulfur. They all have 6 valence electrons in their outer shell making them strong reducers and very good oxidizing agents.

Why are there only 8 electrons in the outer shell?

The shells of an atom cannot accommodate more than 8 electrons, even if it has a capacity to accommodate more electrons. This is a very important rule called the Octet rule. According to this rule, atoms gain, loose or share electrons to achieve the stable configuration similar to the nearest noble gas.

What family would you classify iodine?

Iodine is classified as a halogen — a subset of very chemically reactive elements (Group 17 on the periodic table) that exist in the environment as compounds rather than as pure elements. The other halogens include fluorine (F), chlorine (Cl), bromine (Br) and astatine (At).

What are the names and symbols of all of the elements with full outer shells?

Helium(He), Neon(Ne) and Argon(Ar) all had complete outer shells.

What elements have full outer energy levels?

Noble 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.

Why is 3rd shell 8 or 18?

The third shell of an atom has 18 electrons only not 8 electrons. You might be confused because first the electrons of 4s are filled and then the 10 electrons of 3d shells are filled.

Why doesn’t hydrogen have a family?

Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. However, it varies greatly from the alkali metals as it forms cations (H+) more reluctantly than the other alkali metals.

Which group has two valence electrons?

alkali earth metalsAll of the alkali earth metals, Group 2, have two valence electrons.

How does oxygen get a full outer shell?

Oxygen needs two electrons to fill its outermost electron shell. Hydrogen has one electron to play with. Therefore, an oxygen atom needs two hydrogens to bond to in order to complete its shell.

Why do elements want a full outer shell?

Atoms want a full outer shell because it completes all the gaps in the outside. With no gaps, other electrons don’t want to fit into those spaces. For example, a noble gas like Neon has a full outer shell. It doesn’t react with other chemicals because the electrons from other chemicals can’t fall in anywhere.

What is a full outer shell?

This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons. In general, atoms are most stable, least reactive, when their outermost electron shell is full. … These electron configurations make helium and neon very stable.