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प्रश्न
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)?
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उत्तर
As we move from left to right in a period, the size decreases, therefore, it will be smaller than Cesium.
संबंधित प्रश्न
What is periodicity in properties of elements with reference to the Modern Periodic Table?
What is meant by a period, in a periodic table?
Would you place the two isotopes of chlorine, CI-35 and CI-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
Name two elements in Alkaline earth metals.
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
What is the number of elements in the 1st period?
What is the number of elements in the 3rd period, of the modern periodic table?
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Bisulphite
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
