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Trends in the Periodic Table MCQ1

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Questions and Answers

What is the atomic radius of an element defined as?

The distance between the nuclei of two atoms of the element joined together by a double covalent bond

The distance between the nucleus and the outermost electron of an atom

The distance between the nuclei of two atoms of different elements joined together by a single covalent bond

Half the distance between the nuclei of two atoms of the element joined together by a single covalent bond (correct)

What is the main reason for the decrease in atomic radius across a period?

Increase in atomic mass

Decrease in nuclear charge

Decrease in the number of energy levels

Increase in nuclear charge (correct)

What is the trend in electronegativity down a group?

Electronegativity increases due to increased screening effect

Electronegativity increases due to increased nuclear charge

Electronegativity decreases due to increased atomic radius (correct)

Electronegativity remains constant due to balancing factors

What is the 1st ionisation energy of an element?

The minimum amount of energy required to remove the most loosely bound electron (B) Signup and view all the answers

What is the trend in 1st ionisation energy across a period?

1st ionisation energy increases due to increased nuclear charge (D) Signup and view all the answers

What is the reason for the decrease in 1st ionisation energy down a group?

Increase in atomic radius (B) Signup and view all the answers

What is the 2nd ionisation energy of an element?

The minimum amount of energy required to remove the most loosely bound electron from each singly charged positive ion (C) Signup and view all the answers

Why does electronegativity increase across a period?

Due to decreased atomic radius and increased nuclear charge (A) Signup and view all the answers

What is the primary reason for the increase in atomic radius down a group?

Extra energy levels (C) Signup and view all the answers

Which of the following factors contributes to the decrease in electronegativity down a group?

Increased atomic radius (B) Signup and view all the answers

What is the relationship between the atomic radius and the nuclear charge across a period?

As the nuclear charge increases, the atomic radius decreases (C) Signup and view all the answers

What is the effect of increased screening on the 1st ionisation energy of an element?

It decreases the 1st ionisation energy (B) Signup and view all the answers

What is the effect of the atomic radius on the electronegativity of an element?

As the atomic radius increases, the electronegativity decreases (B) Signup and view all the answers

What is the primary reason for the decrease in atomic radius across a period?

Increased nuclear charge (D) Signup and view all the answers

What is the effect of the nuclear charge on the electronegativity of an element?

As the nuclear charge increases, the electronegativity increases (B) Signup and view all the answers