Semester 1 Chemistry Final Review #2

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom or ion.

Front

How does ionization energy change across a period?

Back

Ionization energy increases from left to right across a period on the periodic table.

Front

How does ionization energy change down a group?

Back

Ionization energy decreases from top to bottom down a group on the periodic table.

Front

What is the atomic mass of an element?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the molecular formula for fluorine gas?

Back

The molecular formula for fluorine gas is F2.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

What is the relationship between atomic number and element identity?

Back

The atomic number uniquely identifies an element; no two elements have the same atomic number.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the average mass of an element's isotopes, while atomic number is the number of protons in the nucleus.