Semester Exam Review

Front

What is the molecular formula for hydrogen sulfide?

Back

H₂S

Front

Which group of elements is known for having very reactive nonmetals?

Back

Halogens

Front

Which element has a greater ionization energy: Magnesium or Phosphorus?

Back

Phosphorus

Front

What is the name of the compound N₂O₃?

Back

Dinitrogen trioxide

Front

What is the mass number of bromine?

Back

80

Front

What is the definition of ionization energy?

Back

The energy required to remove an electron from an atom in its gaseous state.

Front

What are halogens?

Back

A group of highly reactive nonmetals found in Group 17 of the periodic table.

Front

What is the significance of the mass number?

Back

It represents the total number of protons and neutrons in an atom's nucleus.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the periodic trend for electronegativity?

Back

Electronegativity increases across a period and decreases down a group.