Ch. 4/5 Review

Front

Who discovered the nucleus of an atom?

Back

Ernest Rutherford

Front

What is the orbital notation for oxygen?

Back

1s² 2s² 2p⁴

Front

What is the electron configuration of an atom with 10 electrons?

Back

1s² 2s² 2p⁶

Front

Which element is represented by the orbital notation 1s² 2s² 2p³?

Back

Nitrogen

Front

What is the average atomic mass of silicon?

Back

28.09

Front

Define atomic mass.

Back

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

Front

What is the significance of the nucleus in an atom?

Back

It contains protons and neutrons, making up most of the atom's mass and determining its identity.

Front

What does the term 'electron configuration' refer to?

Back

The distribution of electrons in an atom's orbitals.

Front

How many protons are in an atom of carbon?

Back

6 protons.

Front

What is the maximum number of electrons that can occupy the 2nd energy level?

Back

8 electrons.