Atomic Structure and Average Atomic Mass Flashcard

Front

What is the charge of a neutron?

Back

0

Front

Which subatomic particle is directly involved in chemical reactions?

Back

Electron

Front

What does the atomic number of an element represent?

Back

The number of protons

Front

How is the average atomic mass of an element calculated?

Back

By multiplying the mass of each isotope by its natural abundance and then summing these values

Front

What unit is used to express atomic mass?

Back

Atomic mass units (amu)

Front

What is true about isotopes?

Back

They have different numbers of neutrons.

Front

What is the average atomic mass of an element with isotopes of 10 amu (20% abundance) and 11 amu (80% abundance)?

Back

10.8 amu

Front

In the Bohr model of the atom, electrons:

Back

Move in fixed orbits around the nucleus

Front

What is the significance of the quantum mechanical model of the atom?

Back

It treats electrons as waves and particles, and describes their behavior in terms of probabilities

Front

What best describes the nucleus of an atom?

Back

It is positively charged and contains protons and neutrons