S1 Exam - Unit 6 practice

Front

What is the atomic radius?

Back

The atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons. It is a measure of the size of an atom.

Front

Which element in Period 2 has the greatest atomic radius?

Back

Lithium (Li) has the greatest atomic radius in Period 2.

Front

What type of element is Silicon?

Back

Silicon is a metalloid, which means it has properties of both metals and nonmetals.

Front

Which element has the largest atomic radius: Nitrogen (N), Oxygen (O), Phosphorus (P), or Sulfur (S)?

Back

Phosphorus (P) has the largest atomic radius among these elements.

Front

What happens to atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group because you add more shells (energy levels) of electrons.

Front

What are noble gases?

Back

Noble gases are a group of inert (not reactive) gases found in Group 18 of the periodic table.

Front

What is a semiconductor?

Back

A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator, often used in electronic devices.

Front

What is the trend of atomic radius across a period?

Back

As you move from left to right across a period, atomic radius decreases due to increasing nuclear charge, which pulls electrons closer to the nucleus.

Front

Define 'metalloid'.

Back

A metalloid is an element that has properties of both metals and nonmetals, often used in semiconductors.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.