Unit 1- Atomic Theory FINAL Review

Front

What is the electron configuration for an oxygen atom?

Back

1s² 2s² 2p⁴

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in an atom.

Front

Describe the Quantum Cloud (Current) Model of the atom.

Back

This model includes a nucleus and energy levels for the electrons, but those energy levels are not definite orbits.

Front

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

Back

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

Front

What is the average atomic mass of atom X if 4.35% have a mass of 39.946 amu, 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu?

Back

41.97 amu

Front

If an ion has 12 positively charged subatomic particles and a charge of 2+, how many electrons does it have?

Back

The ion has 10 electrons.

Front

What is the definition of an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the significance of the 6 in the context of atomic structure?

Back

The 6 represents the atomic number, which indicates the number of protons in the nucleus.

Front

What is the Bohr (Planetary) Model of the atom?

Back

This model depicts electrons in clear, definite orbits around the nucleus.

Front

What is Dalton's Solid Ball Model?

Back

Dalton's model describes atoms as indivisible solid spheres, which was an early theory of atomic structure.