Chemistry Chapter 3 and 4 Review

Front

What color flame is produced in a flame test by strontium hydroxide (Sr(OH)₂)?

Back

Red.

Front

What is the most abundant isotope of aluminum?

Back

Aluminum-27.

Front

Which subatomic particle determines the identity of an element?

Back

Proton.

Front

What best describes noble gases?

Back

Noble gases tend not to combine with other elements because their valence shell is full.

Front

What is the chemical formula for copper (II) sulfate?

Back

CuSO₄.

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 atomic number of an element?

Back

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

Front

What is the average atomic mass of an element?

Back

The average atomic mass is the weighted average of the masses of an element's isotopes.

Front

What is a flame test used for?

Back

A flame test is used to identify the presence of certain metal ions based on the color of the flame produced.

Front

What are valence electrons?

Back

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