Front

What are Halogens?

Back

Halogens are a group of elements in Group 17 of the periodic table, known for being highly reactive nonmetals. They include fluorine, chlorine, bromine, iodine, and astatine.

Front

What is another name for metalloids?

Back

Metalloids are also known as semiconductors, as they have properties of both metals and nonmetals.

Front

What do Xenon and Silver have in common?

Back

Xenon and silver have the same number of energy levels, which is 5.

Front

How did Mendeleev first order the periodic table?

Back

Mendeleev first ordered the periodic table of elements by increasing atomic mass.

Front

Are all elements in the periodic table solid at 20°C?

Back

False. Not all elements are solid at 20°C; for example, mercury is a liquid at this temperature.

Front

What are Alkali Metals?

Back

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

Front

What are Alkaline Earth Metals?

Back

Alkaline Earth Metals are the elements in Group 2 of the periodic table, characterized by having two valence electrons and being less reactive than alkali metals.

Front

What are Transition Metals?

Back

Transition metals are the elements found in Groups 3-12 of the periodic table, known for their ability to form various oxidation states and colored compounds.

Front

What are Noble Gases?

Back

Noble gases are the elements in Group 18 of the periodic table, known for being inert and having a full valence shell, making them very stable.

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.