Subatomic Particles
This subatomic particle has a positive charge and is found in the nucleus.
Protons
The atomic number of an atom is 8, and its mass number is 16. How many neutrons does it have?
8
This is the term for atoms of the same element with different numbers of neutrons.
Isotopes
These electrons are found in the outermost shell of an atom.
Valence Electrons
The letter "O" is the chemical symbol for this element.
Oxygen
This particle has no charge and helps hold the nucleus together
Neutrons
An atom has 17 protons, 18 electrons, and 20 neutrons. What is its overall charge?
-1
This is the term for an atom with a charge due to gaining or losing electrons.
Ions
Oxygen has this many valence electrons.
6
The number above an element's symbol in the periodic table represents this.
Atomic Number
This negatively charged particle orbits the nucleus
Electrons
An atom has a mass number of 23 and 11 protons. How many neutrons does it have?
12
Carbon-14 and Carbon-12 are examples of these.
Isotopes
Atoms in Group 1 of the periodic table have this many valence electrons.
1
The number below an element's symbol on the periodic table is its average ____.
Atomic Mass
The number of these particles determines the element's atomic number.
Protons
If an atom has 6 protons, 6 neutrons, and 6 electrons, what is its mass number?
12
A chlorine atom with 17 protons and 18 electrons has this charge.
-1
Elements in this group have a full outer shell of valence electrons.
Group 8
Nobel Gasses
In the isotope Carbon-14, the number 14 represents this.
Mass Number
These two particles contribute to an atom's mass.
Protons and Neutrons
An ion has 19 protons and 18 electrons. What is the ion’s charge?
+1
Isotopes of an element differ in this property.
Neutrons
Fluorine has 7 valence electrons. It needs this many more to have a full outer shell.
1
The isotope notation for an oxygen atom with 8 protons and 10 neutrons is written as this.
18 over 8, O