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प्रश्न
Choose the most appropriate answer from the following list of oxides which fit the description.
An amphoteric oxide.
पर्याय
SO2
SiO2
Al2O3
MgO
CO
Na2O
उत्तर
Al2O3
Explanation:
Shows both acidic and basic properties.
APPEARS IN
संबंधित प्रश्न
Write the electronic configuration of K and Ne.
From the following elements :
4Be; 9F; 19K; 20Ca
(i) Select the element having one electron is the outermost shell.
(ii) two elements of the same group.
Write the formula of and mention the nature of the compound formed by the union of 19K and element X(2, 8, 7).
How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table?
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is ______.
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.
Chemical reactivity of elements ?
An element X belong to 3rd periods and group II of the periodic table state:
the valency,
The following table represents the first period of the modern periodic table. Study the table and answer the questions that follow:
(i) Write the formula of the sulphate of the element with atomic number 13.
(ii) What type of bonding will be present in the oxide of the element with atomic number 1?
(iii) Which feature of the atomic structure accounts for the similarities in the chemical properties of the elements in group VIIA of the periodic table?
(iv) Name the element which has the highest ionization potential.
(v) How many electrons are present in the valence shell of the element with atomic number 18?
(vi) What is the name given to the energy released, when an atom in its isolated gaseous state accepts an electron to form an anion?
(vii) What is the electronic configuration of the element in the third period which gains one electron to become an anion?
(viii) Fill in the blanks:
The atomic size ______ as we move from left to right across the period, because the ______ increases, but the ______ remains the same.
The following questions refer to the Periodic Table.
Name the first and last element in period 2.
Choose the most appropriate answer from the following list of oxides which fit the description.
A basic oxide.
Arrange the following as per instruction given in the bracket.
Li, K, Na, H ( decreasing order of their potential ionisation )
