This is the interaction that would occur if two negatively charged electrons came close to each other.
What is repel
This element has 20 protons.
What is Calcium? (Ca)
How many protons and neutrons does Iron-56 have?

26 protons and 30 neutrons
The Atomic Mass of an element with 10 protons, 10 neutrons and 10 electrons?
What is 20 AMU?
This particle has no charge and helps to keep the nucleus in tact.
What is a neutron?
The atomic number is the same as the number of this subatomic particle.
What is a proton?
What region of an atom contains the largest volume?
Cloud (Electron cloud, orbitals)
How many protons and electrons does Be+2 have? 
4 protons and 2 electrons
An element that either has a positive or negative charge
What is an ion?
This subatomic particle is located in the cloud.
What is an electron?
This is the role of neutrons in the nucleus
Provide Stability
These 2 subatomic particles belong in the nucleus
What are protons and neutrons?
How many protons and electrons does P-3 have?

15 protons and 18 electrons
What do you call the same element with a different number of neutrons.
What is an isotope?
This particle has a negative charge and virtually no mass
Electron
How would you expect protons to interact with electrons, given their opposite charges?
They would attract
What region of an atom contains all of the mass?
The nucleus
What is the formula to calculate the top left number (A) in atomic notation?

Protons + Neutrons
The number of neutrons in elemental oxygen with an atomic mass of 16.
What is 8 neutrons?
Which particle(s) that account for the mass of an atom?
What is protons and neutrons?
This fundamental aspect of atom would change if the number of protons was changed.
What is the Element?
This is what it is called when you have more electrons than protons
What is a negative ion?
What symbol should replace X in the Atomic Symbol below?

C (Carbon)
This is what it is called when you have more protons than electrons
What is an Cation (a positive ion)?