CP Chemistry Exam Review

Front

What is the solubility of sodium chloride (NaCl) at 60 ºC?

Back

At 60 ºC, the solubility of sodium chloride matches the solubility of potassium dichromate (K2Cr2O7).

Front

Which group in the periodic table contains the most reactive elements?

Back

The alkaline-earth group contains atoms that are the most reactive.

Front

What is the electron configuration for Bromine (Br)?

Back

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁵.

Front

According to the octet rule, how many valence electrons do most elements need?

Back

Most elements need 8 valence electrons.

Front

Which element is the least electronegative?

Back

Francium is the least electronegative element.

Front

What is the octet rule?

Back

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

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

What is the significance of ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom, indicating how strongly an atom holds onto its electrons.

Front

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

Back

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

Front

What is the relationship between ionization energy and atomic size?

Back

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