Atoms and Particles
This is the name of the tiny, central core of an atom.
What is the nucleus
The nucleus of an atom is made up of these two types of particles
What are Protons and Neutrons
Electrons move around the nucleus in regions called these.
Electron shells
Elements on the periodic table are arranged in order of increasing this number.
Atomic Number
This subatomic particle has a positive charge and is found in the nucleus.
What is a proton
This is the overall charge of the nucleus.
What is Positive
This is the maximum number of electrons that can fit in the first shell (the one closest to the nucleus).
2
The vertical columns on the periodic table are called this.
Groups
This subatomic particle has a negative charge and is found in the space around the nucleus.
What is an electron
This number, often written as "Z", tells you how many protons are in the nucleus of an atom.
What is the atomic number
The electrons found in the outermost shell of an atom are given this special name.
What are valence electrons
The horizontal rows on the periodic table are called this.
Periods
This subatomic particle has no charge (it is neutral) and is also found in the nucleus.
What is a neutron?
This number is found by adding the number of protons and neutrons in the nucleus.
What is the atomic mass
An atom of sodium has 11 electrons. This is how they would be arranged in its shells
2,8,1
Elements in the same group have the same number of these.
Valence electrons
The number of these particles determines the identity of an element.
What are protons?
If an atom of carbon has 6 protons and 6 neutrons, this is its mass number.
What is 12
This is the name for the group of elements that have a full outer shell of electrons, making them very unreactive.
Noble gases
Most of the elements on the left and in the middle of the periodic table are classified as this type of element.
Metals