Atomic Structure Flashcards
What are the names of the three subatomic particles
Protons electrons neutrons
What is the relative charge of protons
+1
What is the relative charge of an electron
-1
What is the relative charge of a neutron
0
what is the relative mass of a proton
1
What is the relative mass of a neutron
1
what is the relative mass of an electron
negligible
What is the atomic number
the number of protons
what is the mass number
is equal to the number of protons +number of neutrons
In an atom ,What is the number of protons equal
the number of electrons
Why do atoms not have an overall charge
the number of protons is equal to the number of electrons. protons are positively charged and electrons are negatively charged so they cancelled out
What happens when an atom loses electrons
it becomes positively charged
What happens when an atom gains electrons
It become negatively charged
why does an atom become negatively charged when it gains electrons
because it has more electrons than protons
what is the size of an atom
1x10 -10 m
