Periodic Table

Front

What are the elements with the most similar chemical properties?

Back

Potassium (K) and Sodium (Na) are elements with similar chemical properties because they are both alkali metals.

Front

Who was the scientist that first grouped elements in triads?

Back

Johann Dobereiner was the scientist who first grouped elements in groups of threes, known as triads.

Front

What are Group 18 elements known as?

Back

Group 18 elements are known as noble gases, which have full valence shells.

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in an atom.

Front

What type of elements run along the zigzag line on the periodic table?

Back

Elements that run along the zigzag line on the periodic table are known as metalloids.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically and its bonding behavior.

Front

What are alkali metals?

Back

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

Front

What are halogens?

Back

Halogens are the elements in Group 17 of the periodic table, known for being very reactive nonmetals.

Front

What is the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically good conductors of heat and electricity, while nonmetals are poor conductors.