Advertisements
Advertisements
प्रश्न
Write an Explanation.
Period
उत्तर
The seven horizontal rows in the modern periodic table are called as periods.
APPEARS IN
संबंधित प्रश्न
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
What is meant by a period, in a periodic table?
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
On which side of the periodic table will you find metals?
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.
Which element has the electronic configuration 2, 8, 2?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
On the basis of electronic configuration, how will you identify the first element of a period?
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
What are horizontal rows and vertical columns in a periodic table known as?
Name two elements in Alkaline earth metals.
How does the electronic configuration of an atom relate to its position in the modern 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)?
What is the number of elements in the 1st period?
Give the symbol and valency of the following element and radical.
Calcium
Give the chemical formula of sodium bicarbonate
Give the chemical formula of sodium sulphite
Give the chemical formula of magnesium nitrate
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.
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
The modern periodic table shows the molecular masses of the elements in each frame.
p-block is composed of groups 1 and 2.
How does the property vary in periods and in groups?
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
Arrange the following elements in the increasing order of their metallic character
| Mg, | Ca, | K, | Ge, | Ga |
Noble gases are placed in the ______ group in the modern periodic table.
Group 16 elements are collectively called as ______.
Explain the position of hydrogen in the periodic table.
Define groups of modern periodic table.
Name the metalloids in the first twenty elements.
Name the non-metals in the first twenty elements.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
