General Chemistry Midterm Review

Front

What is Chemistry?

Back

Chemistry is the study of matter, its properties, composition, structure, and the changes it undergoes.

Front

In which direction does heat transfer occur?

Back

Heat transfer always goes from hot to cold.

Front

What is the atomic mass of an aluminum isotope with 13 protons, 13 electrons, and 14 neutrons?

Back

The atomic mass is 27 (13 protons + 14 neutrons).

Front

What does it mean if five darts strike near the center of a target?

Back

It means the thrower is both accurate and precise.

Front

What particles are found in the nucleus of an atom?

Back

The nucleus contains protons and neutrons.

Front

Define Matter.

Back

Matter is anything that has mass and occupies space.

Front

What is the difference between accuracy and precision?

Back

Accuracy refers to how close a measurement is to the true value, while precision refers to how consistent repeated measurements are.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

What is the role of neutrons in the nucleus?

Back

Neutrons contribute to the atomic mass and help stabilize the nucleus.