Isotopes and Average Atomic Mass

Front

An isotope has three forms.  30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu.  Average atomic mass will be closest to

Back

4 amu

Front

Calculate the average atomic mass of silver.

Back

107.8677amu

Front

An element has two naturally occurring isotopes: one is 10.013 amu (19.9% abundant) and the other is 11.01 amu (80.1% abundant). What is the average atomic mass and what element is it?

Back

10.812, Boron

Front

Compute the average atomic mass for silicon:

Back

28.09

Front

Oxygen has 8 protons. What is oxygen's atomic number?

Back

8

Front

A neutral atom of Carbon-13 has ________ electrons and _________ neutrons

Back

6 electrons and 7 neutrons

Front

Isotopes are atoms of the same element that have the same number of __________ but different number of __________. Therefore, isotopes of the same element have different masses.

Back

protons, neutrons

Front

The  mass of an atom is located  in the ___________ and the volume of an atom is made of the ____________

Back

nucleus, electron cloud

Front

Do the following atoms belong to the same element? Explain
       Aluminum-27
       An atom with 14 protons and 13 neutrons

Back

No because they have different number of protons

Front

What is the atomic number of Neon, Ne?

Back

10