Periodic Table

Front

What is the atomic mass of Astatine?

Back

Astatine has the largest atomic mass among the halogens, approximately 210 u.

Front

What are alkali metals?

Back

Alkali metals are elements in group 1 of the periodic table, characterized by having one electron in their outermost shell. Examples include Lithium, Sodium, and Potassium.

Front

Which element is in period 3, group 14 of the periodic table?

Back

Silicon (Si) is the element located in period 3, group 14.

Front

What are halogens?

Back

Halogens are elements in group 17 of the periodic table, known for being highly reactive nonmetals. Examples include Fluorine, Chlorine, Bromine, Iodine, and Astatine.

Front

What is a group in the periodic table?

Back

A group is a vertical column in the periodic table that contains elements with similar chemical properties.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties, allowing for the prediction of element behavior.

Front

What is the difference between metals and nonmetals in the periodic table?

Back

Metals are typically shiny, malleable, and good conductors of heat and electricity, while nonmetals are usually dull, brittle, and poor conductors.

Front

What is the trend in atomic size across a period?

Back

Atomic size decreases from left to right across a period due to increasing nuclear charge, which pulls electrons closer to the nucleus.

Front

What is the trend in electronegativity down a group?

Back

Electronegativity generally decreases down a group because the increased distance between the nucleus and the valence electrons reduces the nucleus's pull on bonding electrons.

Front

What are noble gases?

Back

Noble gases are elements in group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell. Examples include Helium, Neon, and Argon.