Periodic Properties Quiz

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Questions and Answers

What is the basic unit of the periodic table?

Ion
Atom (correct)
Molecule
Compound

Which group of elements in the periodic table is known for having low reactivity?

Halogens
Alkali metals
Transition metals
Noble gases (correct)

What trend is observed in atomic size as you move from left to right across a period in the periodic table?

Decreases (correct)
Fluctuates
Remains constant
Increases

Flashcards

What is the basic unit of the periodic table?

The atom is the fundamental unit of the periodic table, representing the smallest component of an element that retains the element's chemical properties.

Which elements have low reactivity?

Noble gases are a group of elements known for their extremely low reactivity due to their full valence electron shells, making them very stable.

Atomic size trend across a period?

Atomic size decreases across a period from left to right due to increasing nuclear charge and effective nuclear attraction, which pulls the electrons closer to the nucleus.

Study Notes

What is the basic unit of the periodic table? Which group of elements in the periodic table is known for having low reactivity? What trend is observed in atomic size as you move from left to right across a period in the periodic table?