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CHM101 General Chemistry I Lecture Note Three

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CHM101 General Chemistry I Lecture Note Three

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Questions and Answers

According to valence bond theory, what is the valency of beryllium, boron, and carbon respectively?

Monovalent, divalent, zero

Divalent, zero, monovalent

Divalent, monovalent, zero

Zero, monovalent, divalent (correct)

What is the concept of orbital hybridization in Chemistry?

The concept of mixing atomic orbitals to form a new pure orbital

The concept of mixing atomic orbitals to form a new hybrid orbitals suitable for pairing of electrons in a chemical bonds (correct)

The concept of separating atomic orbitals to form a new hybrid orbitals

The concept of pairing electrons in atomic orbitals

What is the electronic configuration of boron?

1s2 2s2 2p3

1s2 2s2 2p1 (correct)

1s2 2s1 2p3

1s2 2s1 2p2

How many unpaired electrons does the atom of carbon (Z = 6) have?

2 Signup and view all the answers

In reality, what valency do these elements form compounds with?

2, 3, 4 Signup and view all the answers

According to the modern atomic theory postulated by John Dalton, which of the following statements is NOT true?

Atoms of the same element are different Signup and view all the answers

Which scientist is credited with postulating the modern atomic theory?

John Dalton Signup and view all the answers

In the modern atomic theory, what is the role of atoms in forming compounds?

Atoms combine in fixed ratios to form compounds Signup and view all the answers

What did John Dalton consider as the fundamental role of atoms in chemistry?

Composition of matter Signup and view all the answers

What did John Dalton consider as the basis of chemistry?

The concept of atoms Signup and view all the answers