U7 Q1 RC F24

Front

What particle is made up of two 'down' quarks and one 'up' quark?

Back

Neutron

Front

How many neutrons are in the isotope with mass number 63 and atomic number 29?

Back

34

Front

How many neutrons does the isotope 89Kr have?

Back

53

Front

What is the average atomic mass for silicon?

Back

28.09

Front

Which particle has an electric charge of 2/3?

Back

Up quark

Front

Define an isotope.

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the charge of a neutron?

Back

Neutrons have no electric charge (neutral).

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the significance of the mass number?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What is the charge of a down quark?

Back

Down quarks have an electric charge of -1/3.