The group of the element M in the periodic table should be identified. Concept Introduction : The elements are arranged in periodic table as increasing order of atomic number . The molecular formula of a compound can be used to determine the group number of the element. The number of electrons is shared and transfer for the formation of compounds such that all the atoms have complete octet.
The group of the element M in the periodic table should be identified. Concept Introduction : The elements are arranged in periodic table as increasing order of atomic number . The molecular formula of a compound can be used to determine the group number of the element. The number of electrons is shared and transfer for the formation of compounds such that all the atoms have complete octet.
Solution Summary: The author explains that the molecular formula of a compound can be used to determine the group number of the element.
Definition Definition Number of protons in the nucleus of an atom. It uniquely identifies an element, as the number of protons determines the element's properties. The periodic table of elements is arranged based on increasing atomic numbers, allowing scientists to easily locate and study elements.
Chapter 3, Problem 111CP
(a)
Interpretation Introduction
Interpretation:
The group of the element M in the periodic table should be identified.
Concept Introduction:
The elements are arranged in periodic table as increasing order of atomic number. The molecular formula of a compound can be used to determine the group number of the element. The number of electrons is shared and transfer for the formation of compounds such that all the atoms have complete octet.
(b)
Interpretation Introduction
Interpretation:
Name of the element M should be identified.
Concept Introduction:
Molar mass is defined as average mass of atoms present in the chemical formula. It is the sum of the atomic masses of all the atoms present in the chemical formula of any compound.
The formula to calculate mass percent composition for each element is,
A certain element, M, is a main-group metal that reacts with chlorine to give a compound with the chemical formula MCl2 and with oxygen to give the compound MO.(a) To which group in the periodic table does element M belong?(b) The chloride contains 44.7% chlorine by mass. Name the element M
10
(c) An element T has a melting point of 30°C and a boiling point of 2440 °C. It conducts
electricity at room temperature. It burns in oxygen to form an oxide with formula T₂O₂
which can react with both acids and bases. T also forms a compound with fluorine,
which has a high melting point and conducts electricity in molten form. The
approximate relative atomic mass of T is 70.
(1) What type of oxide is T,O,?
(i) Give two properties that indicate that T is probably a metal.
1.
2
(iii) Predict the formula for the fluoride of T
E
[1]
[2]
N
[1]
(iv) What are the products of the electrolysis of the molten fluoride of using inert
electrodes?
and
(v) In which group and period of the Periodic Table will T be placed?
group
period
21
2)
(vi) Write the symbol of the element in the Periodic Table which most closely
resembles T.
Chlorine reacts with oxygen to form Cl2O7. (a) What is the name of this product (see Table 2.6)? (b) Write a balanced equation for the formation of Cl2O7(l) from the elements. (c) Under usual conditions, Cl2O7 is a colorless liquid with a boiling point of 81℃. Is this boiling point expected or surprising? (d) Would you expect Cl2O7 to be more reactive toward H+(aq) or OH− (aq)? Explain. (e) If the oxygen in Cl2O7 is considered to have the -2 oxidation state, what is the oxidation state of the Cl? What is the electron configuration of Cl in this oxidation state?
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