Advertisements
Advertisements
प्रश्न
p-block is composed of groups 1 and 2.
विकल्प
Right
Wrong
Advertisements
उत्तर
p-block is composed of groups 1 and 2- Wrong
संबंधित प्रश्न
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
Fill in the following blank with suitable word:
Group 1 elements are called ...............
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
The modern periodic table was prepared by ______.
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
What is the number of valence electrons in the atoms of first elements in a period?
What is a period in a periodic table?
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Name two elements in Alkali metals.
What do you understand by typical elements?
Name the type of elements which have outermost shell complete.
Name an alkali metal in period 3 and halogen in period 2.
How many periods and groups are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Calcium
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Which of the following statements about the Modern periodic table is correct?
Find the odd one out and give its explanation.
Complete the following flow chart.
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
An element which is an essential constituent of all organic compounds belongs to
Which of the following elements does not lose an electron easily?
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
Noble gases are placed in the ______ group in the modern periodic table.
Spot the error:
There are 5 periods and 17 groups in the modern periodic table.
Explain the position of hydrogen in the periodic table.
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
Define periods of modern periodic table.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Name the metalloids in the first twenty elements.
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:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
