Light and Electrons

Front

What is the mass number of He?

Back

4

Front

What is the atomic number of He?

Back

2

Front

How many protons, neutrons, and electrons are in this helium isotope?

Back

2 protons, 2 neutrons, 2 electrons

Front

Where does the average atomic mass come from for hydrogen?

Back

weighted average of all isotopes of hydrogen

Front

Where do elements like Beryllium-8 come from? Use helium as an example.

Back

Fusion between another helium gives us 4 protons and 4 neutrons (beryllium - 8).

Front

What does the number 91 represent in the name zirconium-91?

Back

the mass number

Front

Which of the following sets is correct? Zn-65, 65 protons, 65 electrons, Mg-24, 12 protons, 12 neutrons, U-238, 92 protons, 92 neutrons, Pb-207, 207 protons, 207 electrons

Back

Mg-24, 12 protons, 12 neutrons

Front

An atom has an atomic number of 32 and a mass number of 73. How many protons, neutrons, and electrons does this neutral atom contain?

Back

32 protons, 41 neutrons, 32 electrons.

Front

Identify the element that has 31 neutrons and a mass of 59.

Back

nickel

Front

Which statement about isotopes is true? Options: Isotopes have different chemical properties, Isotopes have different atomic numbers, Isotopes have different numbers of electrons, Isotopes have different masses

Back

Isotopes have different masses