ATOMIC STRUCTURE
ATOMIC MODELS
ELECTRON CLOUD & FORCES
PERIODIC TABLE
ELEMENTS, ISOTOPES & IONS
100
The smallest unit of an element that still has the properties of that element.
What is an ATOM?
100
This model describes the atom as positively charged with negatively charged particles embedded throughout.
What is the plum pudding model?
100
The electron cloud is divided into these, also called energy levels.
What are shells?
100
The number of protons in an atom of an element, used to identify the element.
What is the atomic number?
100
Atoms of the same element that have different numbers of neutrons are called these.
What are isotopes?
200
This positive subatomic particle is found in the nucleus of an atom.
What is a proton?
200
In this model, electrons are in shells in the electron cloud but do NOT travel in fixed orbits.
What is the electron cloud model?
200
Electrons in the outermost energy level of the electron cloud are called these.
What are valence electrons?
200
The number of protons and neutrons in the nucleus of an atom.
What is the mass number?
200
A charged atom is called this.
What is an ion?
300
This neutral subatomic particle is found in the nucleus of an atom.
What is a neutron?
300
In this model, the center of the atom is positive and the negative part surrounds it.
What is the Nuclear Model?
300
Electrons in the shell closest to the nucleus have this amount of energy compared with electrons farther away.
What is the least amount of energy?
300
These are the vertical columns on the periodic table, also known as families.
What are groups?
300
This is the weighted average of all the different versions of an element and is measured in amu
What is average atomic mass?
400
This negative subatomic particle is found in the electron cloud.
What is an electron?
400
Name the two models that were compared when explaining how scientists' understanding of the atom changed.
What are the plum pudding model and nuclear model?
400
This attractive force exists between the positive nucleus and the negative electron cloud.
What is the electromagnetic force?
400
These are the horizontal rows on the periodic table.
What are periods?
400
These are the most reactive metals and are found in Group 1. (What are they called)
What are the alkali metals?
500
These particles make up protons and neutrons, and their attraction holds the nucleus together.
What are quarks?
500
Draw A Bohr Model for Oxygen-16
500
This force between quarks in the nucleus holds the nucleus together despite the repulsive electromagnetic force between positive protons.
What is the strong nuclear force?
500
Elements in the same group often have similar properties because they have the same number of these.
What are valence electrons?
500
These are the most reactive nonmetals and are found in Group 17. (What are they called)
What are the halogens?