Chemistry

Periodic Classification and Elements

1,092 Questions

Periodic classification organizes chemical elements based on atomic structure, periodic laws, and elemental properties. It covers historical classification systems, electron configurations, and periodic trends. Test takers preparing for chemistry sections will find these questions crucial for mastering fundamental element properties and atomic interactions.

Periodic table structureAtomic orbitalsElement identificationPeriodic laws

Periodic Classification and Elements Questions

Multiple choice

Hydrogen

  1. it is the lightest element

  2. stored in solid state

  3. it is called future full

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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Multiple choice

Which of the following properties is formulated by Mandeleev?

  1. The properties of elements are the periodic functions of their atomic radii.

  2. The properties of elements are the periodic functions of their atomic numbers.

  3. The properties of elements are the periodic functions of their atomic masses.

  4. The properties of elements are the periodic functions of their number of elements.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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Multiple choice

Consider the following statements and choose which among them are the characteristics of an atom: I. The atoms of an element are all alike but different from those of others. II. The atoms of an element show all the properties of the element. III. One kind of atom can be changed into another.

  1. I and II

  2. I and III

  3. II and III

  4. I, II and III
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

One kind of atom cannot be changed into another. And an atom can neither be created nor be destroyed by a chemical means.