Unit 3 chemistry review

Front

What is a dot diagram?

Back

A dot diagram, also known as a Lewis dot structure, represents the valence electrons of an atom as dots around the element's symbol.

Front

What is the correct dot diagram for fluorine (F)?

Back

The correct dot diagram for fluorine has 7 dots representing its 7 valence electrons.

Front

What is the electron configuration for an oxygen atom?

Back

1s² 2s² 2p⁴.

Front

What happens to atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases because you add more and more shells (energy levels).

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

Which element has the smallest ionization energy in Period 6?

Back

Cesium (Cs) has the smallest ionization energy in Period 6.

Front

What is the trend of ionization energy across a period?

Back

Ionization energy generally increases across a period from left to right.

Front

What is the significance of valence electrons?

Back

Valence electrons determine an atom's chemical properties and its ability to bond with other atoms.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table.

Front

What is the relationship between atomic mass and atomic radius?

Back

Atomic mass does not directly affect atomic radius; atomic radius increases with the addition of energy levels.