Periodic Table 2
Properties of Matter 2
Mixtures 2
Chemical Reactions 2
Scientific Method
200

The number of protons

What is an element's atomic number?

200

Liquid's particles do this

What state of matter has particles that easily move around and take the shape of its container?

200

Homogeneous and heterogeneous are also called these

What are solutions and suspensions?

200

This type of bond is formed when two atoms share electrons between each other.

What is a covalent bond?

200

The Scientific Method

What is the process scientists go from asking a question to finding an answer?
400

They are the most common elements in the universe

What are hydrogen and helium?

400

The opposite of evaporation

What is condensation?

400

Emulsion is also called this

What is a colloid?

400

Sodium chloride

What is NaCl? (table salt)

400

This group creates the independent variable

What is a trick question? (no group makes it)

600

Electrons in the outer-most shell of an atom

What are valence electrons?
600

Determined by the gravitational pull on an object

What is weight?

600

The scattering of light by particles in a colloid or suspension

What is the Tyndall Effect?

600

A change in a substance that is usually a permanent irreversible change.


What is a chemical change?

600

The control variable

What is the variable created by the control group because it does NOT receive the independent variable?

800

This does not increase when we go down a column / group

What is the number of valence electrons?

800

Triple beam balance

What device is used to measure mass?

800

The rarest state of matter

What is plasma?

800

The reason an atom has a negative charge

What is having more electrons than protons?

800

Sharing results

What is the last step of the scientific method?

1000

The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.

What is reactivity?

1000

A substance has a density of 100 g/L and a volume of 10 liters

What is a mass of 1,000 grams

1000

Water with a high mineral content

What is hard water?


1000

Synthesis reaction

What is a reaction where two reactants combine to make a larger, more complex product?

1000

The first step in the scientific method.  It leads to making an inference.

What is observation?