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An element belongs to the third period and Group IIIA (13) of the periodic table. State: if it is a metal or non-metal?
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An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element.
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Name and state the following with reference to the elements of the first three periods of the periodic table.
Metalloid in Period 3.
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Name and state the following with reference to the elements of the first three periods of the periodic table.
Valency of elements in Group 14 and 15.
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Name and state the following with reference to the elements of the first three periods of the periodic table.
Non-metallic elements present in Period 3 of Groups 15 and 16.
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Name and state the following with reference to the elements of the first three periods of the periodic table.
Alkaline earth metal in period 3.
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State the nature of compounds formed when group 17 elements combine with (i) metals (ii) non-metals.
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Going across a period left to right, atomic size _____.
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Moving left to right in the second period, the number of valence electrons _____.
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Moving down in the second group, number of valence electrons ______.
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An element A has 2 electrons in its fourth shell. State:
its valency
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An element A has 2 electrons in its fourth shell. State:
position in the periodic table
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An element A has 2 electrons in its fourth shell. State:
is it a metal or non-metal
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An element A has 2 electrons in its fourth shell. State:
is it an oxidising or reducing agent
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Give the general group study of hydrogen with reference to
valence electrons
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Hydrogen is evolved when dilute HCl reacts with magnesium, but nothing happens in the case of mercury and silver. Explain.
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Under what conditions can hydrogen be made to combine with nitrogen?
Name the products and write the equation for the reaction.
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Under what conditions can hydrogen be made to combine with sulphur?
Name the products and write the equation for the reaction.
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Under what conditions can hydrogen be made to combine with oxygen?
Name the products and write the equation for the reaction.
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Choose terms from the options given in brackets to complete this sentence.
Hydrogen is ………………… soluble in water.
(sparingly, highly, moderately)
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