Show:
Atoms, Ions and Molecules
Properties of Water
Miscellaneous
Chemical Reactions
Periodic Table
100
The smallest basic unit of matter
What is atom
100
Is water a polar molecule? True? False?
What is True
100

The group to which Barium belongs.

What is group 2 (or what is the alkali metals)?

100
Is change of substances into different substances by breaking and forming chemical bonds
What is Chemical reactions
100

This is how the periodic table is organized.

What is Atomic Number?

200
Is one particular type of atom and it cannot be broken down into a simpler substance by ordinary chemical means
What is Element
200

Attraction between water molecules.

What is Cohesion?

200

An example of an ionic compound.

What is NaCl (accept other correct answers.)

200
A Chemical reaction releases more energy than it absorbs
What is Exothermic
200

Horizontal rows on the periodic table.

What are periods?

300
Is a substance made of atoms of different elements bonded together in a certain ratio
What is Compounds
300

Is the attraction between molecules of different substances, such as water and glass.

What is Adhesion?

300

NH3

What is Ammonia?

300
Chemical reaction absorbs more energy than it releases
What is endothermic
300
The family name of group 17.

What is Halogens?

400
Is an atom that has gained or lost one or more electrons
What is Ion
400

Is a mixture of substances that is the same throughout and is also known as a  homogeneous mixture. 

What is a Solution?

400

Sulfuric Acid

What is H2SO4?

400
The amount of energy that needs to be absorbed for a reaction to start
What is Activation Energy
400

Three of the noble gases.

(any three is fine)

What are: Helium, Neon, Argon, Krypton, Xenon, Radon?

500

Is two or more atoms held together by covalent bonds.

What is a Molecule? (when atoms are held together by ionic bonds the result is called a formula unit.)

500

Is a substance that dissolves in a solvent

What is Solute

500

The most chemically reactive metal and the most chemically reactive non-metal.

What are cesium and fluorine?

500

Although the products of a combustion reaction are usually CO2 and H2O, this is sometimes a product produced by combustion in an environment with low oxygen.

What is CO (carbon monoxide)?

500

The synthetic elements.

What is all elements above #92 (also accept those produced in a lab OR the "transuranium elements.)