Atoms
What is an Atom
An atom is the basic building block of chemistry.
Who made the Bohr Model?
Niels Bohr
what is an isotope?
atoms of the same element with different numbers of neutrons!
What is a Ion?
atoms that have a unequal amount of protons and electrons
Atoms consist of what three basic strutures..?
Protons, Electrons, and Neutrons.
When was the Bohr Model created?
1913
what is an isotope notation?
how isotopes are shown using the element symbol and mass number!
Electrons in the outermost shell are called what?
Valence Electrons
Which structure determines the identity of an element
Protons
Which model did the Bohr Model replace?
JJ Thomson's plum pudding model.
isotopes of an element have a different number of...
neutrons!
What is a cation?
A Ion with a positive charge
What 2 structures make up the nucleus in an Atom
Protons and neutrons
True or False
Niels Bohr was Danish
True!
true or false:
Dalton's theory was entirely correct
false!
True or false
An anion has lost electrons
False
True or False
Atoms are the smallest part of a substance that can be broken down chemically.
False
The Bohr Model was replaced by which model?
The quantum atomic model
why do isotopes of the same element behave similarly?
because they have the same number of protons and electrons, which determine how they behave!
What is ionization
the process of gaining or losing electrons to become a charged ion