GenChem - Lecture - Atomic Trends

What are the period and group trends of different properties?

• Trends in atomic size and reactivity

• Trends in color and state of matter

• Trends in temperature and pressure

• Trends in phase changes and solubility

How are period and group trends in atomic radii related to electron configuration?

• They are directly related to the number of protons in the nucleus.

• They are determined by the number of electron shells and the effective nuclear charge.

• They are not related to electron configuration but to the atomic mass.

• They are related to the gravitational pull between electrons and the nucleus.

What term is used to describe the energy required to remove an electron from an atom or ion?

• Principal energy level

• Octet rule

• Ion

• Ionization energy

Which term refers to the tendency of an atom to attract electrons towards itself when it is chemically combined with another element?

• Ion

• Ionization energy

• Electronegativity

• Principal energy level

What is the name of the rule that states atoms tend to combine in such a way that they each have eight electrons in their valence shell, giving them the same electronic configuration as a noble gas?

• Ionization energy

• Electronegativity

• Principal energy level

• Octet rule

What term describes the specific energy level an electron is located in around the nucleus of an atom?

• Ionization energy

• Electronegativity

• Octet rule

• Principal energy level

What is the electron configuration of Helium?

• 1s^2 2s^2

• 1s^2 2s^2 2p^6

• 1s^2

• 1s^2 2s^2 2p^6 3s^2 3p^6

How many valence electrons does neon have?

• 2

• 8

• 10

• 18

How many valence electrons does argon have?

• 2

• 8

• 18

• 22

How many valence electrons does krypton have?

• 2

• 8

• 18

• 36