Chemistry - Semester 1 Final Exam Review (LG2-4)

Front

Which element in period 2 is the most reactive?

Back

Fluorine (F) is the most reactive element in period 2.

Front

What does the number 1.00794 represent in chemistry?

Back

The number 1.00794 represents the atomic mass of hydrogen.

Front

What is the atomic mass of silicon?

Back

The atomic mass of silicon is 28.

Front

What type of compound is represented by the formula 3 CH₄?

Back

3 CH₄ is a covalent compound.

Front

What is the correct name for the ion P³⁻?

Back

The correct name for P³⁻ is phosphide.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

Define covalent bond.

Back

A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons, while covalent compounds are formed by the sharing of electrons.

Front

What is the significance of valence electrons?

Back

Valence electrons determine an atom's ability to bond with other atoms.

Front

What is the formula for calculating atomic mass?

Back

Atomic mass is calculated as the weighted average of the masses of an element's isotopes.