ACA Unit 1 Atomic Structure & Nuclear Chemistry

Front

What is the average atomic mass of chlorine given that 75.89% has a mass of 35 and 24.11% has a mass of 37?

Back

35.48 amu

Front

What are the particles in an atom that are neutral and have no charge?

Back

Neutrons

Front

Calculate the average atomic mass of Argon with isotopes Argon-36 (0.336% abundance), Argon-38 (0.063% abundance), and Argon-40 (99.60% abundance).

Back

39.98 amu

Front

Back

Front

What is the first action to take in the event of a lab accident?

Back

Tell the teacher.

Front

Define atomic mass.

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the significance of the atomic number?

Back

It represents the number of protons in the nucleus of an atom and defines the element.

Front

Explain the concept of isotopic abundance.

Back

The relative amount of each isotope of an element in a natural sample.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the atomic mass and stabilize the nucleus.