Unit 3 Review

Front

Which group of elements has the lowest ionization energies?

Back

Alkali Metals (Group 1) have the lowest ionization energies due to their single valence electron, which is easily removed.

Front

What is the dot diagram for Oxygen (O)?

Back

The dot diagram for Oxygen shows 6 valence electrons represented as dots around the element symbol (O).

Front

What is the noble gas configuration for Neon?

Back

The noble gas configuration for Neon is [He]2s²2p⁶, indicating a full outer shell.

Front

Which atom has the largest atomic radius: Potassium (K), Calcium (Ca), Selenium (Se), or Bromine (Br)?

Back

Potassium (K) has the largest atomic radius due to its position in Group 1, where atomic size increases down the group.

Front

What is the correct electron configuration for a carbon atom?

Back

The correct electron configuration for a carbon atom is 1s² 2s² 2p².

Front

Define ionization energy.

Back

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

Front

What trend is observed in ionization energy across a period?

Back

Ionization energy generally increases across a period from left to right due to increasing nuclear charge.

Front

What is the significance of the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

Explain the concept of electronegativity.

Back

Electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.

Front

What is the relationship between atomic radius and ionization energy?

Back

As atomic radius increases, ionization energy decreases because the outer electrons are further from the nucleus.