Advertisements
Advertisements
प्रश्न
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
पर्याय
Cl > Si > Al > Mg > Na
Na > Mg > Al > Si > Cl
Na > Al > Mg > Cl > Si
Al > Na > Si > Ca > Mg
Advertisements
उत्तर
Na > Mg > Al > Si > Cl
Explanation:
Metallic character refers to the tendency of an element to lose electrons. In the periodic table:
- Across a period (from left to right), metallic character decreases because the atomic size decreases and the effective nuclear charge increases, making it harder to lose electrons.
- All the given elements (Na, Mg, Al, Si, Cl) belong to Period 3.
- Arranging them from left to right in Period 3 gives the order of decreasing metallic character: Sodium (Na) > Magnesium (Mg) > Aluminium (Al) > Silicon (Si) > Chlorine (Cl).
APPEARS IN
संबंधित प्रश्न
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
Arrange the following as per the instructions given in the brackets:
Cl, F, Br, I (increasing order of electron affinity)
Name any five periods properties.
Name the periodic property which relates to the character of element which loses one or more electrons when supplied with energy.
How do the following change on moving from left to right in a period of the periodic table?
Give examples in support of your answer.
Nature of oxides of the elements ?
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
Arrange the elements of group 17 and group 1 according to the given conditions.
Increasing non – metallic character
Explain why the following statement is not correct:
All groups contain metals and non metals.
In Period 3, the most metallic element is ______.
State whether the following statement is true or false
All members of zero group are non metals.
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
Supply the missing word from the words given in brackets.
If an element has one electron in its outermost energy level, then it is likely to be _ (metallic, non metallic)
A group of elements in the periodic table is given below (Boron is the first member of the group and thallium is the last.)
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following questions in relation to the above group of elements:
- Which element has the most metallic character?
- Which element would be expected to have the highest electronegativity?
- If the electronic configuration of aluminium is 2, 8, 3, how many electrons will be there in the outermost shell of thallium?
- The atomic number of boron is 5. Write the chemical formula of the compound formed when boron reacts with chlorine.
- Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.
Electronegativity is the metallic property of an element.
Write an explanation.
Electropositivity
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
Which of the following sets of atomic numbers belong to that of alkali metals?
Three elements B, Si and Ge are
Which of the following set of elements is written in order of their increasing metallic character?
