IPC/Chem Semester Final Review

Front

Which is the least reactive group in the periodic table?

Back

Noble gases are the least reactive group due to their full valence electron shell.

Front

What is a Lewis dot diagram?

Back

A Lewis dot diagram is a representation of the valence electrons of an atom, showing how they are arranged in pairs or as single electrons.

Front

What evidence indicates a chemical change has occurred?

Back

Differences in the two sides of a chemical equation indicate a chemical change.

Front

Classify the following elements: Si, Na, Al.

Back

Si is a metalloid, Na is a metal, and Al is a metal.

Front

What must be true for an atom to be electrically neutral?

Back

An electrically neutral atom must have equal numbers of electrons and protons.

Front

What are alkali metals?

Back

Alkali metals are highly reactive metals found in Group 1 of the periodic table, such as lithium, sodium, and potassium.

Front

Define nonmetals.

Back

Nonmetals are elements that lack the characteristics of metals, often found on the right side of the periodic table, such as oxygen and nitrogen.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in an atom's nucleus and determines the element's identity.

Front

Explain what a chemical reaction is.

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the atomic mass and stabilize the nucleus but do not affect the charge of the atom.