Groups of the periodic table

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the significance of the periodic table's groups?

Back

Groups in the periodic table are columns that contain elements with similar chemical properties and the same number of valence electrons.

Front

What are alkali metals?

Back

Alkali metals are the elements found in Group 1 of the periodic table, characterized by having one valence electron and being highly reactive.

Front

What are alkaline earth metals?

Back

Alkaline earth metals are the elements in Group 2 of the periodic table, known for having two valence electrons and being reactive, but less so than alkali metals.

Front

What are noble gases?

Back

Noble gases are the elements in Group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell.

Front

What is the period of an element?

Back

The period of an element refers to its row in the periodic table, indicating the number of electron shells it has.

Front

How many valence electrons do halogens have?

Back

Halogens, found in Group 17, have seven valence electrons.

Front

What is the general trend of reactivity in alkali metals?

Back

Reactivity increases as you move down the group in alkali metals.

Front

What is the general trend of atomic size in the periodic table?

Back

Atomic size increases as you move down a group and decreases as you move across a period from left to right.

Front

What is the role of transition metals in the periodic table?

Back

Transition metals are found in Groups 3-12 and are known for their ability to form various oxidation states and colored compounds.