Question

3. Name :
(a) three elements that have a single electron in their
outermost shells.
(b) two elements that have two electrons in their
outermost shells.
(c) three elements with filled outermost shells.
ISAT-20117​

Answer 1

Explanation:

A) All the elements belonging to 1st group of the periodic table have one electron in their outermost shell. So hydrogen, lithium, sodium, potassium, Rubidium, cesium and francium elements have one electron in their outermost shell.

B) Lithium and Beryllium are two element has 2 electrons in their outer most shell.

C ) helium,neon,and argon are those elements which completely filled the outer most shell.

Answer 2

Answer:

hydrogen

lithium in which only one electron in their outermost shell

Explanation:

berilium

carbon which have two electron in their outermost shell

Zink and neon have full filled orbital