Atomic Structure and Average Atomic Mass Flashcard

Front

What is the charge of a neutron?

Back

0

Front

What unit is used to express atomic mass?

Back

Atomic mass units (amu)

Front

Who discovered that the atom was positively charged, and mostly made up of empty space?

Back

Rutherford

Front

In the Bohr model of the atom, electrons:

Back

Move in fixed orbits around the nucleus

Front

Which of the following is true about isotopes?

Back

They have different numbers of neutrons.

Front

What is the charge of a proton?

Back

+1

Front

What is the charge of an electron?

Back

-1

Front

What is the nucleus of an atom composed of?

Back

Protons and neutrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus.

Front

What is average atomic mass?

Back

The weighted average of the masses of an element's isotopes.