Periodic Table Unit Test Review

Front

What is an alkali metal?

Back

Alkali metals are elements found in Group 1 of the periodic table, characterized by having one valence electron, which makes them highly reactive. Example: Sodium (Na).

Front

Which element has an electron structure most similar to that of element X?

Back

To determine similarity in electron structure, compare the number of valence electrons. Elements in the same group have similar electron configurations.

Front

What is electronegativity?

Back

Electronegativity is a measure of how well an atom can attract and hold onto electrons in a chemical bond.

Front

Which element has the highest electronegativity among W, X, Y, and Z?

Back

Electronegativity increases across a period and decreases down a group. The element in the upper right corner of the periodic table typically has the highest electronegativity.

Front

How does the number of valence electrons affect reactivity?

Back

Elements with fewer valence electrons tend to be more reactive because they can easily lose electrons to achieve a stable electron configuration.

Front

What is the electron configuration of Sodium (Na)?

Back

The electron configuration of Sodium (Na) is 1s² 2s² 2p⁶ 3s¹.

Front

What are the properties of alkali metals?

Back

Alkali metals are soft, shiny, have low density, and are highly reactive, especially with water.

Front

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

Back

Groups (columns) indicate elements with similar chemical properties, while periods (rows) indicate elements with the same number of electron shells.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, conductive, and malleable, while nonmetals are dull, insulative, and brittle.

Front

What is the trend of atomic radius in the periodic table?

Back

Atomic radius decreases across a period from left to right and increases down a group.