Front

What is the most reactive group of nonmetals on the periodic table?

Back

Halogens (Group 17) are the most reactive group of nonmetals and have a valence electron pattern of s²p⁵.

Front

Which element has the smallest atomic radius?

Back

Hydrogen has the smallest atomic radius among the given options.

Front

What is an example of a physical change?

Back

Evaporating water is classified as a physical change.

Front

Which element is in the same group as phosphorus?

Back

Arsenic is in the same group (Group 15) as phosphorus.

Front

What type of property is the ability of copper to conduct heat and electricity?

Back

The ability of copper to conduct heat and electricity is a physical property.

Front

What is the definition of a chemical property?

Back

A chemical property is a characteristic of a substance that becomes evident during a chemical reaction.

Front

What is the definition of a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are alkali metals?

Back

Alkali metals are elements in Group 1 of the periodic table, known for being highly reactive.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically with other elements.

Front

What is the periodic trend for atomic radius?

Back

Atomic radius generally decreases across a period from left to right and increases down a group.