Honors Chemistry Semester 1 Final Exam Study Guide

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Which element has the highest electronegativity: Na, Cl, S, or Al?

Back

Cl has the highest electronegativity.

Front

What is a chemical change?

Back

A chemical change is a process that results in the formation of new chemical substances.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What indicates a chemical change?

Back

Signs of a chemical change include color change, gas production (bubbling/foaming), and heat/light production.

Front

What does NOT indicate a chemical change?

Back

A phase change does NOT indicate a chemical change.

Front

What is the difference between Phosphide, Phosphate, and Phosphite?

Back

Phosphide is a traditional ion, Phosphate is a polyatomic ion with four oxygen atoms, and Phosphite is a polyatomic ion with three oxygen atoms.

Front

What do elements in the same group of the periodic table have in common?

Back

Elements in the same group have the same number of valence electrons.

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is a polyatomic ion?

Back

A polyatomic ion is a charged species composed of two or more atoms covalently bonded.