END OF MODULE 3 TEST

Front

What is the charge of an atom with 3 protons, 4 neutrons, and 2 electrons?

Back

The atom has a +1 charge.

Front

How do you calculate the average atomic mass of an element with multiple isotopes?

Back

Multiply the relative mass of each isotope by its abundance (as a decimal), sum these values, and divide by the total abundance.

Front

What is the atomic mass of Uranium?

Back

238.03 amu.

Front

Who proposed the ancient atomist theory?

Back

Democritus.

Front

What happens to the atomic number of an element during beta decay?

Back

The atomic number increases by 1.

Front

What does the atomic number represent?

Back

The number of protons in an atom.

Front

What is an isotope?

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the significance of the atomic mass unit (amu)?

Back

It is a standard unit of mass that quantifies mass on an atomic or molecular scale.

Front

How can you identify an element using the periodic table?

Back

By its atomic number, which corresponds to the number of protons.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.