Show:
Ions
Let's Bond
The Name's the Game
Balanced Basics
Elements & the Periodic Table
100
The electrons in the outer-most level of an atom.
What are valence electrons?
100
The attractive force that holds atoms together.
What is a chemical bond?
100
The prefix that means two.
What is "di-"?
100

Balance: H₂ + O₂ → H₂O

2H₂ + O₂ → 2H₂O

100

The number of protons in an atom is called this.

What is the atomic number?

200
This number is the number of electrons in an atom's outer shell, making it very stable (NOT the first shell).
What is 8?
200
This bond forms from the attraction between oppositely charged atoms.
What is an ionic bond?
200
The name of this compound: MgO.
What is magnesium oxide?
200

Balance: N₂ + H₂ → NH₃

N₂ + 3H₂ → 2NH₃

200

An element's identity is determined by the number of these particles.


The periodic table is arranged in order of increasing this number.

300
Charged particles that form when one or more valence electrons transfer from one atom to another.
What is an ion?
300

This bond forms when two (or more) atoms share electrons. (Between non metals)

What is a covalent bond?

300
The prefix that means six.
What is "hexa-"?
300

Balance: Na + Cl₂ → NaCl

2Na + Cl₂ → 2NaCl

300

The periodic table is arranged in order of increasing this number.

What is atomic number?

400
A negatively charged atom that occurs when an atom gains an electron.
What is an anion?
400
This type of element forms covalent bonds.
What are nonmetals?
400
The chemical formula for this compound: potassium chloride.
What is KCl?
400

Balance: Mg + O₂ → MgO

2Mg + O₂ → 2MgO

400

Elements in the same vertical column are called this

What are groups/families?

500

A model that shows only the valence electrons in an atom or compound

What is an Lewis dot structure?

500
The cation in an ionic bond is usually this type of element.
What is a metal?
500
The name of this compound: N2O.
What is dinitrogen monoxide?
500

Balance: Al + O₂ → Al₂O₃

4Al + 3O₂ → 2Al₂O₃

500

Elements in the same group tend to have similar chemical properties because they have similar numbers of these.

What are valence electrons?