Semester 1 Final Exam

Front

All elements in group 2 have __ valence electrons

Back

2

Front

The unknown gas is __ (He, Ne, Xe, Ar, O)

Back

Ne

Front

Electron affinity decreases moving from top to bottom on the periodic table because __

Back

the valence electrons are further from the nucleus

Front

The noble gas electron configuration for Ca is __

Back

[Ar]4s²

Front

Ionization energy moving from left to right across the periodic table because __

Back

the effective nuclear charge increases

Front

What is the definition of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the periodic trend for atomic radius?

Back

Atomic radius generally decreases from left to right across a period and increases from top to bottom in a group.

Front

Define ionization energy.

Back

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

Front

What is the significance of noble gases in the periodic table?

Back

Noble gases are known for their lack of reactivity due to having a full valence shell.

Front

Explain effective nuclear charge.

Back

Effective nuclear charge is the net positive charge experienced by an electron in a multi-electron atom, accounting for shielding by other electrons.