Which of the following is not true of the halogens
All of them have seven electrons in their outer shell
They either gain an electron by forming an ionic bond or form a covalent compound by electron sharing
All exhibit variable valancy
All form diatomic molecules

The covalent molecule which has four electrons in the outer shell of each atom not included in sharing during formation of its molecule:

Which atom can have more than eight valence electrons when it is forming covalent bonds ?

Which atom can have more than eight valence electrons when it is forming covalent bonds ?

Choose the correct answer: In the periodic table alkali metals are placed in group - A:1, B:11, C:17, D:18 Which of the following properties: do not match with elements of the halogen family, A : They have seven electrons in their valence shell, B : They are highly reactive chemically, C: They are metallic in nature, D: They are diatomic in their molecular form.

An atom X has 2,8,7 electrons in its shells. It combines with Y having 1 electron in its outermost shell. Write the formula of the compound formed.

If the electronic configuration of an element is 2, 4, then it is most likely to form which bond, a covalent or electrovalent bond?

The attraction that an atom exerts on a electrons that are being shared with another atom for forming covalent bond is referred to as its

The group in the modern periode table, in which all the elements do not have same number of electrons in their valence shell is :

Give suitable chemical term for the following: A bond formed by a shared pair of electrons with both electrons coming from the same atom.

If an element has seven electrons in its outermost shell then it is likely to have the _____ [largest/smallest] atomic size among all the elements in the same period.