blach
No
No elements have the same average mass, but some isotopes are the same mass as other elements, For example Carbon-13 (an isotope of carbon) has the same mass as nitrogen-13 (which is also an isotope of nitrogen).
No two elements may have the same atomic number. But two elements may have same atomic mass. Hence atomic number is better than atomic mass.
These particles are: proton and neutron.
Asia and Europe both share the same land mass.
No
Europe and Asia share the same land mass.
Asia and north America
They are the same size but The land mass in the Eastern hemisphere is larger.
Eurasia
Australia
What two continente are joined together in one large land mass
They are both on the same land mass, the island of Ireland. However they are two different countries.
Europe and Asia form one large land mass
It is called Eurasia. Because technacilly they are the same continent. They are not separated by water.
glssopteris and other fossels were found on different contenents and could not swim across. also all of the contenents fit together like a. jiggsaw puzzle