Semester 1 Final Exam Review 24/25

Front

What are the products of the reaction between H₂SO₄ and BaCl₂?

Back

BaSO₄(s) + HCl(aq)

Front

How do you calculate the number of neutrons in an isotope?

Back

Subtract the atomic number from the mass number. For example, in ⁸⁹₃₆Kr, neutrons = 89 - 36 = 53.

Front

What is the charge of an atom that has lost one electron?

Back

+1

Front

How many protons does an O₂ atom have?

Back

8

Front

What does the number 16 represent for the element sulfur?

Back

Atomic number.

Front

What is the definition of atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is the definition of atomic mass?

Back

The weighted average mass of an element's isotopes.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the significance of BaSO₄ in a chemical reaction?

Back

It is a precipitate formed in the reaction between H₂SO₄ and BaCl₂.

Front

What is the definition of an ion?

Back

An atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.