Periodic Table 2
The number of protons
What is an element's atomic number?
Liquid's particles do this
What state of matter has particles that easily move around and take the shape of its container?
Homogeneous and heterogeneous are also called these
What are solutions and suspensions?
This type of bond is formed when two atoms share electrons between each other.
What is a covalent bond?
The Scientific Method
They are the most common elements in the universe
What are hydrogen and helium?
The opposite of evaporation
What is condensation?
Emulsion is also called this
What is a colloid?
Sodium chloride
What is NaCl? (table salt)
This group creates the independent variable
What is a trick question? (no group makes it)
Electrons in the outer-most shell of an atom
Determined by the gravitational pull on an object
What is weight?
The scattering of light by particles in a colloid or suspension
What is the Tyndall Effect?
A change in a substance that is usually a permanent irreversible change.
What is a chemical change?
The control variable
What is the variable created by the control group because it does NOT receive the independent variable?
This does not increase when we go down a column / group
What is the number of valence electrons?
Triple beam balance
What device is used to measure mass?
The rarest state of matter
What is plasma?
The reason an atom has a negative charge
What is having more electrons than protons?
Sharing results
What is the last step of the scientific method?
The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.
What is reactivity?
A substance has a density of 100 g/L and a volume of 10 liters
What is a mass of 1,000 grams
Water with a high mineral content
What is hard water?
Synthesis reaction
What is a reaction where two reactants combine to make a larger, more complex product?
The first step in the scientific method. It leads to making an inference.
What is observation?