Question 1

What property of elements is primarily responsible for the periodicity observed in the periodic table?

Accepted Answer

Atomic number

Answer

Mass number

Answer

Valence electrons

Answer

Electron affinity

Question 2

Which of the following best explains why elements in the same group of the periodic table have similar chemical properties?

Accepted Answer

They have the same number of valence electrons.

Answer

They have the same number of protons.

Answer

They have the same atomic mass.

Answer

They have the same atomic radius.

Question 3

What is the term for the repeating pattern of chemical and physical properties exhibited by elements as they are arranged in the periodic table?

Accepted Answer

Periodicity

Answer

Uniformity

Answer

Isotropy

Answer

Symmetry

Question 4

What trend is observed in atomic radius as you move down a group in the periodic table?

Accepted Answer

Atomic radius increases.

Answer

Atomic radius fluctuates.

Answer

Atomic radius remains the same.

Answer

Atomic radius decreases.

Question 5

Which element would you expect to have the highest electronegativity based on periodic trends?

Accepted Answer

Fluorine

Answer

Bromine

Answer

Oxygen

Answer

Sodium

Question 6

As you move from left to right across a period in the periodic table, which of the following trends is observed?

Accepted Answer

Ionization energy increases.

Answer

Ionization energy remains constant.

Answer

Ionization energy fluctuates.

Answer

Ionization energy decreases.

Question 7

Which of the following best describes the trend in electronegativity as you move across a period from left to right on the periodic table?

Accepted Answer

Electronegativity increases.

Answer

Electronegativity decreases.

Answer

Electronegativity remains the same.

Answer

Electronegativity shows no pattern.

Question 8

What happens to metallic character as you move from left to right across a period in the periodic table?

Accepted Answer

Metallic character decreases.

Answer

Metallic character increases.

Answer

Metallic character fluctuates.

Answer

Metallic character remains the same.

Question 9

What is the trend in atomic mass as you move down a group in the periodic table?

Accepted Answer

Atomic mass increases.

Answer

Atomic mass fluctuates.

Answer

Atomic mass decreases.

Answer

Atomic mass remains constant.

Question 10

Which of the following statements is true regarding the alkali metals found in Group 1 of the periodic table?

Accepted Answer

They are highly reactive and have one valence electron.

Answer

They are gaseous at room temperature and have four valence electrons.

Answer

They are stable and have no valence electrons.

Answer

They are non-reactive and have two valence electrons.

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