Elements
What is the smallest particle of an element?
Atom
What is the chemical formula for water?
H₂O
In a saltwater solution, what is the solute?
Salt
Our five senses used to describe the physical properties of an object.
What are SIGHT, SMELL, HEARING, TASTE, and TOUCH?
Water has undergone a _______________ when it is turned from a liquid to a gas through boiling.
PHYSICAL CHANGE
True or False: Elements can be found on the periodic table.
True
Glucose is written as C₆H₁₂O₆. How many total atoms are in one molecule?
24
Used to separate a MIXTURE of iron filings and sand.
magnet
Is color a physical or chemical property?
Physical
Which type of change produces a new substance?
CHEMICAL CHANGE
Which of these is an element? Iron (Fe), Glucose (C₆H₁₂O₆), Water (H₂O).
Iron(Fe)
It is made of 2 OR MORE elements joined together in a molecule.
Compound
Salt dissolving into water.
solution?
Matter can be found in these three states.
LIQUID, SOLID, or GAS?
____________ changes occur when sugar is added to coffee to sweeten it, peanuts are crushed into peanut butter, and paper is cut into tiny pieces.
PHYSICAL
A student looks at the periodic table to identify a substance. That substance must be a(n) __________.
Element
A scientist discovered a compound with 4 nitrogen atoms and 2 oxygen atoms. Write its formula.
N₄O₂
What happens to concentration when more solvent is added?
It decreases / the solution is diluted
Flammability is an example of which type of property?
Chemical
Fireworks exploding, wood burning, iron rusting, a pie baking, 2 clear liquids combining to produce a colored liquid all are indicators of a __________ change occurring.
CHEMICAL
Which elements make up the compound H₂SO₄?
Hydrogen, Sulfur, Oxygen
How many atoms of each element are in the compound Al₂(SO₄)₃?
Aluminum: 2 atoms
Sulfur: 3 atoms
Oxygen: 12 atoms
Total: 17 atoms
Which of these does not increase the rate at which a solute dissolves: stirring, heating, crushing, or adding more solute?
Adding more solute
Solubility (ability to dissolve) is which type of property?
Physical
Which observation best shows a chemical reaction occurred: ice melting, salt dissolving, water boiling, or gas forming?
Gas Forming