
a)
Interpretation:Four elements that are non-metals should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus.
b)
Interpretation: Two elements that are metals should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
c)
Interpretation: Three elements that are gases at room temperature should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
d)
Interpretation: Three elements that are solid at room temperature should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
e)
Interpretation: One pair of elements that are likely to form a covalent compound should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
f)
Interpretation: Another pair of elements that are likely to form a covalent compound should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
g)
Interpretation: one pair of elements that are likely to form an ionic compound with formula
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
h)
Interpretation: Another pair of elements that are likely to form an ionic compound with formula
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
i)
Interpretation: Two elements that are likely to form an ionic compound with formula
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
j)
Interpretation: Two elements that are likely to form an ionic compound with formula
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
k)
Interpretation:An element that form no compound should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.
l)
Interpretation: The compounds of elements that exhibit the law of multiple proportions should be identified.
Concept introduction:In 1869, modern periodic table was first invented by Dmitri Mendeleev. In modern periodic table, different elements are present in rows and columns. Along the rows and columns, physical and chemical properties of elements change.
Elements are those atoms that have same number of protons in their nucleus. Atomic mass is the mass of a single atom of that chemical element.

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Chapter 2 Solutions
Principles of General Chemistry
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