Advertisements
Advertisements
Question
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.
Solution
a) The block shown by box A is s-Block.
S(16) = 2, 8, 6 (electronic configuration of any element in s block)
b) The block of element denoted by letter B is d – Block.
The period number of that element is 4.
APPEARS IN
RELATED QUESTIONS
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
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.
Answer the following in respect of element `31/15 P `
What is its valency?
Answer the following in respect of element `31/15 P `
Is it a metal or non - metal
Give the trend in metallic character:
down the group top to bottom.
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
In Period 3, the most metallic element is ______.
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element.
Which non-metallic element has the valency of 2?
State whether the following statement is true or false
All members of zero group are non metals.
If an element is in group 7 is it likely to be metallic or non metallic in character?
Supply the missing word from the words given in brackets.
If an element has one electron in its outermost energy level, then it is likely to be _ (metallic, non metallic)
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
Write the name.
Two elements having two orbits.
Write an Explanation.
Electropositivity
Write scientific reason.
The non-metallic character increases while going from left to right in a period.
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
The lightest liquid metal is ______
Identify the elements with the following property and arrange them in increasing order of their reactivity
- An element which is a soft and reactive metal
- The metal which is an important constituent of limestone
- The metal which exists in liquid state at room temperature
Choose the odd one out and write the reason: