Periodic Table Flashcard

Front

What is the Periodic Law?

Back

The Periodic Law states that when elements are arranged by atomic number, there is a periodic repetition of their chemical and physical properties.

Front

What are non-metals?

Back

Non-metals are elements that typically lack the characteristics of metals. They are usually poor conductors of heat and electricity and can be gases or brittle solids at room temperature.

Front

What is the chemical symbol for nitrogen?

Back

The chemical symbol for nitrogen is N.

Front

How do energy levels compare between nitrogen and oxygen?

Back

Nitrogen has the same number of energy levels as oxygen.

Front

What trend is observed when moving left to right across the periodic table?

Back

Elements change from metals to non-metals.

Front

Which element is considered non-reactive?

Back

Xenon is considered a non-reactive element.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and non-metals, often used in semiconductors.

Front

What is the significance of valence electrons?

Back

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

Front

What are rare earth metals?

Back

Rare earth metals are a group of 17 elements that are typically found together in nature and are known for their unique properties.

Front

What is the atomic number?

Back

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