Understanding SPDF Block Elements

What is the primary basis for the arrangement of elements in the periodic table?

• Number of valence electrons

• Atomic radius

• Atomic mass

• Number of protons

Which group of elements is known for having a single valence electron in their s orbital?

• Alkaline earth metals

• Noble gases

• Alkali metals

• Halogens

Why are alkali metals not found in their pure form in nature?

• They are highly reactive

• They are non-conductive

• They have high melting points

• They are too dense

Which elements are included in the p-block of the periodic table?

• Only metals

• Non-metals, semi-metals, and post-transition metals

• Only semi-metals

• Only non-metals

What are halogens known for?

• Having high melting points

• Forming salts with metals

• Being found in pure form in nature

• Being the least reactive non-metals

What is a characteristic property of transition metals in the d-block?

• Low melting points

• Being non-metallic

• High reactivity with water

• Good electrical conductivity

Where are d-block elements located in the periodic table?

• At the top

• At the bottom

• On the left side

• In the center

What is a common property of lanthanides in the f-block?

• They are found in large quantities

• They are non-metallic

• They are non-reactive

• They are silvery white metals

Which of the following is true about actinides?

• They are non-radioactive

• They are mostly man-made

• They are all naturally occurring

• They are non-reactive

What is a shared characteristic of both lanthanides and actinides?

• They have low energy levels

• They are very reactive with halogens

• They are found in pure form in nature

• They are non-reactive with halogens