Electrons
Atomic
Stable Ions
Compounds
Chemical Composition
100

These are electrons in the outermost energy level of an atom.

What are valence electrons?

100

This is the number of protons in a carbon atom. 

What is 6?

100

This is the mass of an atom.

What is atomic mass?

100

This is the chemical formula for water.

What is H2O?

100

This is the basic unite of a chemical element.

What is an atom?

200

Atoms are usually most stable with this amount of valence electrons.

What is 8?

200

The atomic number tells you this about an atom.

What is the amount of protons?

200

This is what columns are called on the period table.

What is a group?

200

This model shows the valence electrons in atoms as dots.

What is the lewis dot model?

200

This is a charged particle that results when the number of protons and electrons differ.

What is an ion?

300

This is the number of valence electrons in an oxygen atom.

What is 6?

300

This is a substance composed of a long chain of repeating units.

What is a polymer?

300
This is an atom with the same number of protons but a different number of neutrons than indicated on the period table.

What is an isotope?

300

CO₂ is made of this many atoms total.

What is 3 atoms?

300

This is the condition of which a nucleus is unlikely to decay.

What is a stable element?

400

This group on the periodic table contains elements with 1 valence electron.

What are alkali metals?

400

These are ions, molecules, or atoms held together in an ordered, three-dimensional arrangement.

What are crystals?

400

Chlorine becomes a stable ion by doing this.

What is gaining one electron?

400

This is the type of bond in NaCl.

What is an ionic bond?

500

This element has 5 valence electrons and is found in period 2.

What is nitrogen?

500

This particle has no charge and is found in the nucleus of an atom.

What is a neutron?

500

This transition metal forms a stable 2+ ion and is used in batteries.

What is zinc?

500

This is the correct chemical formula for calcium chloride.

What is CaCl2

500

This is the formula of a compound containing 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass.

What is CH₂O?