Variation of Electronegativity

Q.

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configurations of these two elements. Which of these will be more electronegative? Why?

Q.

As oxygen has an atomic radius greater than nitrogen similarly, does sulphur has an atomic radius greater than phosphorus?

Q. Why is flourine highly electronegative?
Why is Fr least electronegative?

Q.

How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?

Q.

(a) How does the tendency to lose electrons change as we go down in group 1 of the periodic table? Why does it change this way?

(b) How does the tendency to gain electrons change as we go down in group 17 of the periodic table? Why does it change this way?

Q. Why are there so many metals but very few non-metals?

Q.

How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?

Q.

why do not the metal ions repel each other in a metallic bond? though the magnitude of negetive charge is less than that of the positive once?

Q.

(a) How does the electropositive character of elements change on going down in a group of the periodic table?

(b) State how the valency of elements varies (i) in a group, and (ii) in a period, of the periodic table.

Q.

Which of the following elements does not lose an electron easily?

1. Na

2. F

3. Mg

4. Al

Q. is group 2 elements have +ve electron gain enthalpy ? if it is then why?

Q. Assertion :Electronegativity across a period increases and down the group decreases. Reason: As we move down the group, basic character increases while as we move across a period its acidic character increases

1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
3. Assertion is correct statement but reason is wrong statement.
4. Assertion is wrong statement but reason is correct statement.

Q.

Among the elements given below, the elements with the least electronegativity is:

1. Lithium

2. Carbon

3. Boron

4. Fluorine

Q. Which of the following elements have the different value of electronegavity:- (1)H (2)S (3)Te (4)P

Q. Arrange the following elements in the decreasing order of electronegativity.

1. Oxygen (O)
2. Nitrogen (N)
3. Fluorine (F)
4. Carbon (C)

Q. how to find atomic no. if group and period are given

Q. The group in the modern periodic table having the highest electronegativity is .

1. halogens
2. alkali
3. alkali earth
4. chalcogens

Q.

Between the atomic numbers $1,11,13$and $31$, which of these elements is the most metallic? Explain.

Q. The elements of the third period of the Modern periodic table are given below. The most and the least electronegative elements respectively are:​

1. Na, Cl​
2. Al, S​
3. Cl, Na​
4. Al, Cl​

Q. ntWe know that when atoms looses electrons cations are formed and for loosing electron they should be in isolated gaseous form.But in the formation of NaCl does sodium metal changes into gaseous form before giving an electon to chlorine ?n

Q. (a) How does the electropositive character of elements change on going down in a group of the periodic table?
(b) State how the valency of elements varies (i) in a group, and (ii) in a period, of the periodic table.

Q.

Can electrons leave their shells freely ?

Q.

Select the metalloid element from the given group of elements.

1. Cl

2. S

3. Si

4. Na

Q. Which of the following statements is not correct about the trends when going from left to right across a period in the periodic table?

1. The elements become less metallic in nature.
2. The number of valence electrons increases.
3. The atoms lose their electrons more easily.
4. The oxides becomes more acidic.

Q.

Which of the following is more electronegative?

1. Non metals

2. Metalloids

3. Noble gases

4. Metals

Q. The group in the modern periodic table having the highest electronegativity is .

1. halogens
2. alkali
3. chalcogens
4. alkali earth

Q.

The elements of the second period of the Periodic Table are given $Li$ $Be$ $B$ $C$ $N$ $O$$F$Identify the most
Metallic and Nonmetallic element.

Q. Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?

Q. As nuclear charge increases, atomic orbitals become smaller and more stable.

1. True
2. False

Q.

The most electronegative element is

1. Fluorine

2. Chlorine

3. Oxygen

4. Bromine