First Semester Finals Practice Test - Copy

Front

How did Mendeleev arrange the elements?

Back

Mendeleev arranged the elements by atomic mass.

Front

Which pair has the highest ionization energy?

Back

The pair with the highest ionization energy is N and O.

Front

Which group of elements needs to gain two electrons to achieve octet?

Back

Group 16, the oxygen group, needs to gain two electrons to achieve octet.

Front

What is the product of 6.02 x 10^23 and 7.1 x 10^-31?

Back

The product is 4.3 x 10^-7.

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2.

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 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

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What are noble gases?

Back

Noble gases are elements in group 18 of the periodic table that are characterized by their lack of reactivity due to having a full valence shell.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.