Concept explainers
As pure elements, all of the halogens are diatomic molecular species. Their melting points are:
Elemental formula: ______ Phase at room temperature: ______
Interpretation:
The elemental formula and phase of elemental astatine are to be stated.
Concept introduction:
The periodic table is an important part of chemistry. In this table, all known elements are arranged on the basis of their atomic number. Elements having same outer electronic configuration are kept in same groups. The elements on left of periodic table are metals, on right are nonmetals and in center are transition metals and metalloids.
Answer to Problem 1ASA
The elemental formula of astatine is
Explanation of Solution
The elemental forms of other members of astatine group are
The melting points of
Since astatine is present after iodine in the group, therefore, its melting point is higher than
So,
The elemental formula of astatine is
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Chapter 12 Solutions
Chemical Principles in the Laboratory
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