Parts of the Atom
This particle has a positive charge
What is a Proton?
This tells the number of protons in an atom.
What is the Atomic Number?
This number on the periodic table tells how many protons an atom has.
What is the Atomic Number?
In a Bohr model, electrons go in these around the nucleus.
What are shells or energy levels?
These are the electrons in the outermost shell.
What are Valence Electrons?
This particle has no charge
What is a Neutron?
This is the total number of protons and neutrons in an atom.
What is the Mass Number?
The Symbol for Sodium
What is Na?
This is the maximum number of electrons in the first shell.
What is 2?
These are the vertical columns on the periodic table.
What are groups or families?
This particle has a negative charge and is found outside the nucleus
What is an Electron?
An atom has 8 protons and 8 neutrons. This is its mass number.
What is 16?
If an atom is neutral, this is equal to the number of protons
What are Electrons?
This is the maximum number of electrons in the second shell.
What is 8?
These are the horizontal rows on the periodic table.
What are Periods?
These two particles are found in the nucleus
What are Protons and Neutrons?
An atom has atomic number 12. This is the number of protons it has.
What is 12?
You round this number on the periodic table to estimate the mass number.
What is Atomic Mass?
Oxygen has 8 electrons. In a Bohr model, this is how many go in the second shell.
What is 6?
Sodium is in Group 1, so it has this many valence electrons.
What is 1?
This is the center of the atom where most of the mass is found
What is the Nucleus?
An atom has atomic number 17 and mass number 35. This is the number of neutrons.
What is 18?
This is the approximate number of neutrons in calcium if its atomic number is 20 and its rounded atomic mass is 40.
What is 20?
Aluminum has 13 electrons. In a simple Bohr model, its electron arrangement is this.
What is 2, 8, 3?
Neon is in Group 18, so it has this many valence electrons.
What is 8?