Advertisements
Advertisements
प्रश्न
To the left of the zig-zag line in the periodic table are the metal elements.
विकल्प
Right
Wrong
उत्तर
To the left of the zig-zag line in the periodic table are the metal elements- Right
APPEARS IN
संबंधित प्रश्न
Why do all the elements of the same group have similar properties?
Fill in the following blank with suitable word:
Group 18 elements are called ...............
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
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
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
What are the groups in a periodic table? Give two characteristics of each.
Correct the statement.
Copper and zinc are representative elements.
Answer the following in respect of element `31/15 P`
Give its electronic configuration
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What will be the formula of its phosphate?
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
How many periods and groups are there in the modern periodic table?
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Bisulphate
Give the chemical formula of calcium phosphate
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
The modern periodic table has 1 to 7 periods.
The K and L shells of the elements Na and Mg contain electrons.
Write an Explanation.
Period
Complete the following flow chart.
Explain structure of modern periodic table in short.
Identify gas A in the following experiment.
Which of the following elements does not lose an electron easily?
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
______ group elements are called alkaline earth metals.
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
Define groups of modern periodic table.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
