Basics
This is the smallest unit of an element that still has the properties of that element.
Atoms
This subatomic particle has a positive charge.
Proton
This number tells you the number of protons in an atom.
What is the atomic number?
Isotopes have a different number of this subatomic particle.
Neutrons
An atom becomes an ion when it gains or loses these particles.
Electron
This dense region at the center of an atom contains protons and neutrons.
Nucleus
This subatomic particle has a negative charge.
Electron
What element has 13 protons?
Aluminum
Carbon-12 and Carbon-14 have the same number of these particles.
Protons
An atom that loses 2 electrons will have this charge
+2
These three subatomic particles make up atoms.
What are protons, neutrons, and electrons?
An element in the 15th group has this many valence electrons.
5
An atom has an atomic number of 12 and a mass number of 25. This is its number of neutrons.
13
Carbon-14 has 6 protons. This is the number of neutrons it has.
8
An atom has 11 protons and 10 electrons. What is its charge?
+1
The identity of an element is determined by the number of these particles in its atoms.
protons
The 2nd shell holds this many valence electrons.
8
An atom contains 17 protons, 18 neutrons, and 17 electrons. Its mass number is this.
35
This isotope has 8 protons and 7 neutrons.
Oxygen-15
An atom has 8 protons and 10 electrons. What is its charge?
-2
This is where electrons are located.
Electron cloud
An atom has 15 protons and is neutral. This is the number of electrons it has.
15
Neon is in this group.
18th
Nitrogen-15 has ____ protons and ____ neutrons.
7,8
The Ionic charge of fluorine is.
-1