The atomic model Flashcards
What three sub-atomic particles are in an atom?
Protons, neutrons and electrons.
What is the relative mass and relative charge of a proton?
The relative mass = 1 The relative charge= +1
What is the relative mass and relative charge of a neutron?
The relative mass = 1 The relative charge= 0
What is the relative mass and relative charge of an electron?
The relative mass = Almost 0 The relative charge= -1
What happens if an atom loses one or more electrons?
It becomes a positively charged ion.
What happens if an atom gains one or more electrons?
It becomes a negatively charged ion.
What is the atomic number of an atom?
The number of protons an atom contains.
What is the mass number of an atom?
The total number of neutrons and protons an atom contains.
How many protons and electrons does this element have?
17
How many neutrons does this element have?
18
