Advertisements
Advertisements
Question
Write scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
Solution
Metallic character goes on decreasing while going from left to right in a period because the tendency of atoms of the elements to lose electrons (or gain electrons) changes in a period. As we move from left to right in a period, the nuclear charge increases due to a gradual increase in the number of protons. Due to the increase in nuclear charge, the valence electrons are pulled strongly by the nucleus and it becomes difficult for the atoms to lose electrons. Hence, the metallic character decreases.
APPEARS IN
RELATED QUESTIONS
Arrange the following as per the instructions given in the brackets:
Na, K, Cl, S, Si (increasing order ionization energy)
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:
The element B would have ______ metallic character than A.
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
The elements at the bottom of a group would be expected to show ______ metallic character than the element at the top.
Which has the maximum metallic character Na, Li or K?
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
iii) Observe the figure and answer the following questions.
a) Identify the block shown by box A and write an electronic configuration of any one element of this block.
b) Identify the block of element denoted by letter B and write its period number.
For the main group of the periodic table, the metallic properties of the elements vary approximately with their position as shown in the table.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| H | He | ||||||
| A | B | ||||||
| C | D |
Will the most non-metallic element be found at A,B,C or D ?
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
Select the correct answer
Which of the following electronic structure is of a metal?
Identify the metallic oxide which is amphoteric in nature.
Refering to changes in the properties of elements on moving from left to right across a period of the periodic table. Choose the correct answer.
The non-metallic character of the elements :
Write the name.
Two elements having two orbits.
Write an Explanation.
Electronegativity
Write scientific reason.
The metallic character of elements increases while going down the groups.
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
Which of the following sets of atomic numbers belong to that of alkali metals?
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.
