2.1 Atomic structure and isotopes Flashcards
What are the three subatomic particles in an atom?
Protons
Neutrons
Electrons
Where can you find the protons and neutrons?
In the nucleus
Where can you find the electrons?
In shells surrounding the nucleus
Where can you find most of the atom’s mass?
In the nucleus
Atoms contain the same number of protons as …
Electrons
Every atom of the same element contains the same number of….
Protons
On the periodic table, each element is shown with the number of protons as its …
Atomic number
What does the mass number = to?
Number of protons + number of neutrons
What is the atomic number = to?
Number of protons
How do you work out number of neutrons?
Mass number - number of protons
Why my isotopes not be written with the number of protons?
Becuase it never changes
Different isotopes of the same element have the same number of…
Electrons
Which subatomic partical has no effect on reactions on the element (interms of isotopes)?
Neutrons
Different isotopes of an elelemtn react in …
the same way
What are the differnces when differnt isotopes of an elemnt react?
There may be small differnces in physical properties, higher-mass isotopes of an element having a higher melting, boiling point and density - but the chemical reaction stays the same.
