Variation of Valency

Q.

Write the number of valence electrons present in a nitrogen atom ${}_7{}^{14}\mathrm{N}$?

Q.

Lead has only one valency.

1. True
2. False

Q.

Write the symbol and valency of aurous.

Q.

The atomic number of an element is $16$. Predict its valency

Q. The valency of elements in the periodic table with respect to hydrogen:

1. increases regularly from $1$ to $8$
2. decreases regularly from $1$ to $8$
3. first increases from group I to group IV and then decreases
4. first decreases from group I to group IV and then increases

Q.

An element $X$ lies in the third period and group $17$. Find out,

the number of valence electrons in its atom

Q.

If a particle has eight electrons in its outermost orbit, but total number of electrons in it is more than the protons in its nucleus, then it is called _____ and it is ______ in character.

Q. Which among the following elements has a valency one?

1. Zinc
2. Sodium
3. Magnesium
4. Aluminium

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is the basic differences between proton and neutron?

Q.

What is the valency of silicon with atomic number 14?

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is an electron? What is its relative mass and charge?