Structure Of The Atom Flashcards
What sub atomic particles are atoms made of?
Protons
Neutrons
Electrons
What is the charge of an electron?
Negative (1-)
What is the charge on a proton?
Positive (1+)
What is the charge on a neutron?
Neutral
What is the definition of the Mass Number?
The total number of protons and neutrons in the nucleus in an atom
What is the definition of the Atomic Number?
The number of protons in the nucleus of an atom
All atoms of the same element have the same atomic number
What is an element?
Something made up of only ONE type of atom?
If an atom has an overall neutral charge, what does this mean about it’s proton and electrons?
It will have the same number of protons and electrons
How is the number of neutrons calculated in a neutral atom?
Mass Number - Atomic number
What is the symbol for the Atomic Number?
Z
What is the symbol for the Mass Number?
A
What is and ion?
An atom that has lost or gained an electron
If an atom gains one electron it will be 1-
If and atom loses one electron it will be 1+
What is an isotope?
Isotopes of an element are atoms with the same number of protons but DIFFERENT numbers of NEUTRONS
Do isotopes have the same chemical properties?
Yes, they have the same configuration of electrons
The arrangement of electrons decide the chemical properties
Do isotopes have the same physical properties?
No
Physical properties depend more on the mass of an atom
Eg. Different densities and rates of diffusion
