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प्रश्न
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
उत्तर
The chemical reactivity of alkali metals increases on going down in group 1 of the periodic table.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
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 would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
On the basis of electronic configuration, how will you identify chemically similar elements?
How many groups and periods does the modern periodic table have?
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
State what is meant by the term chemical formula.
Name the metalloids in the first twenty elements.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
