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प्रश्न
To the left of the zig-zag line in the periodic table are the metal elements.
पर्याय
Right
Wrong
उत्तर
To the left of the zig-zag line in the periodic table are the metal elements- Right
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संबंधित प्रश्न
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
Fill in the following blank with suitable word:
Group 1 elements are called ...............
Give two example of group 18 elements.
The three elements having chemical symbols of Si, B and Ge are:
(a) all metals
(b) all non-metals
(c) all metalloids
(d) Si is metalloid, B is metal and Ge is non-metal
Which element has two shells, both of which are completely filled with electrons?
Which element has the electronic configuration 2, 8, 2?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
Explain why All the elements of a period have different chemical properties.
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Give the group number of following elements present in periodic table
Name two elements in Alkali metals.
Name the metals in the first twenty elements.
Name the type of elements which have outermost shell complete.
Name the type of elements which have one electron short of octet.
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
Name the noble gas with 3 shells.
Write a short note.
Structure of the modern periodic table.
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?
In the Modern Periodic Table – atoms of all elements are arranged according to their increasing order of – atomic numbers. An atom of nitrogen has seven protons and seven electrons. State what would be its atomic number.
Give the symbol and valency of the following element and radical.
Potassium
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
State what is meant by the term chemical formula.
State the number of elements in Period 3 of the Periodic Table.
What are the elements.
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
The K and L shells of the elements Na and Mg contain electrons.
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
On moving from left to right in a period in the periodic table, the size of the atom ______
The amount of energy released when one or more electrons is added to the neutral atom is ______
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?
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 same valency as Lithium.
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 Metalloid?
Define periods of modern periodic table.
An element has 2 electrons in its N shell.
State its position in periodic table.
