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प्रश्न
Find the odd one out and give its explanation.
विकल्प
Carbon
Calcium
Oxygen
Neon
उत्तर
Calcium
Explanation-
Calcium is a s-block element while others are p-block elements.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 1 elements are called ...............
How many periods and groups are there in the long form of periodic table?
On which side of the periodic table will you find metals?
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 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
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same group of the periodic table?
Which element has two shells, both of which are completely filled with electrons?
Which element has the electronic configuration 2, 8, 2?
On the basis of electronic configuration, how will you identify chemically similar elements?
On the basis of electronic configuration, how will you identify the first element of a period?
(b) What is the number of elements is 3rd period, the modern periodic table?
The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):
| a 3 |
b 4 |
c 5 |
d 6 |
e 7 |
f 8 |
g 9 |
h 10 |
|
| i 11 |
j 12 |
k 13 |
l 14 |
m 15 |
n 16 |
o 17 |
p 18 |
(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
Name two elements in halogens.
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Name an element of group 18 which can form compounds.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Answer the following question.
Define the atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so?
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Calcium
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the chemical formula of sodium bicarbonate
Give the chemical formula of ammonium sulphate
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
The modern periodic table has 1 to 7 periods.
Distinguish between:
s-block - p-block
Elements in the modern periodic table are arranged in ______groups and______ periods.
______ and ______ are called inner transition elements.
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
In the modern periodic table, elements are arranged according to their ______
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?
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.
______ group elements are called alkaline earth metals.
An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
Name the non-metals in the first twenty elements.
