Advertisements
Advertisements
Question
The position of elements A, B, C, D and E in the periodic table are shown below:
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
D |
|
B |
C |
|
A |
|
|
E |
Which type of ion will be formed by elements A, B, and C.
Solution
Element A will form a positive ion 1+ (cation).
Element B will form a positive ion 2+ (cation).
Element C will form a negative ion 1- (anion).
APPEARS IN
RELATED QUESTIONS
Fill in the blank in the following statement:
On going down in a group in the periodic table, the metallic character of elements ...............
Five elements A, B, C, D and E have atomic numbers of 2, 3, 7, 10 and 18 respectively. The elements which belong to the same period of the periodic table are:
(a) A, B, C
(b) B, C, D
(c) A, D, E
(d) B, D, E
On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?
(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases
In each of the following pair, choose the atom having the bigger size:
(a) Mg (At. No.12) or Cl (At. No.17)
Four elements P, Q, R and S belong to the third period of the Modern Periodic Table and have respectively 1, 3, 5 and 7 electrons in their outermost shells. Write the electronic configurations of Q and R and determine their valences. Write the molecular formula of the compound formed when P and S combine.
How can the valency of an element be determined if its electronic configuration is known?
Select the correct answer
Number of shells in potassium are
Use the letters only written in the Periodic Table given below to answer the questions that follow:
(a) State the number of valence electrons in the atom J.(b) Which element shown forms ions with a single negative charge?
(c) Which Metallic element is more reactive than R?
(d) Which element has its electrons arranged in four shells?
Arrange the following in order of increasing radii:
Mg2+, Mg, Mg+
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.