Advertisements
Advertisements
Question
Find the odd one out and give its explanation.
Options
F
K
Cl
I
Advertisements
Solution
K
Explanation-
K is placed in group 1 while others are placed in group 17 of the modern periodic table.
APPEARS IN
RELATED QUESTIONS
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
How many rows and columns are there in the modern periodic table?
Give two example of group 17 elements.
Give two example of group 18 elements.
On which side of the periodic table will you find non-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.
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same group of the periodic table?
What is a period in a periodic table?
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
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?
Name the scientist who stated the modern periodic law.
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
Name the type of elements which have two electrons in the outermost orbit.
State its position in the periodic table?
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
Name the noble gas with 3 shells.
What is the number of elements in the 3rd period, of the modern periodic table?
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the chemical formula of sodium nitrate
Give the chemical formula of ammonium sulphate
Give the chemical formula of calcium phosphate
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
To the left of the zig-zag line in the periodic table are the metal elements.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
Noble gases belong to______ group of the periodic table.
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: ______
On moving from left to right in a period in the periodic table, the size of the atom ______
What is the symbol of the element Tungsten?
Which of the following statements about the Modern Periodic Table is correct:
Which of the following elements does not lose an electron easily?
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
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).
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Which of the element is a Noble gas?
