Advertisements
Advertisements
प्रश्न
Moseley’s periodic table is based on atomic mass.
पर्याय
True
False
उत्तर
False
Correct Statement: Moseley’s periodic table is based on atomic number.
APPEARS IN
संबंधित प्रश्न
A metal X is in the first group of the periodic table. What will be the formula of its oxide?
The elements A, B and C belong to groups 1, 14, and 17 respectively of the periodic table.
(a) Which two elements will form a covalent compound?
(b) Which two elements will form an ionic compound?
A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser.
(a) What are X, Y and Z?
(b) To which group of periodic table does X belong?
(c) Name the periodic table in which X is placed.
(d) Which element is placed just before X in the period?
(e) Which element is placed just after X in the period?
How did the early chemists classify elements?
Classify the following elements into Metals and Nonmetals.
S, Mg, Al, P, N, Na.
Example for liquid metal is ______.
Which of the following have inert gases 2 electrons in the outermost shell.
The elements A, B, and C belong to groups 1, 14, and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
The atomic number of an element 'X' is 11.
- Write the electronic configuration of X and find its valency.
- Write the formula and nature of its oxide.
Element 'X' forms an oxide with the formula X2O3 which is a solid with high melting point. ‘X’ would most likely be placed in the group of the Periodic Table as:
