It's All in the Formula...
What element is represented by the symbol "Fe"?
What is iron
What does the small number 2 mean in H2?
What is that there are 2 hydrogen atoms in the molecule
This term is defined as "the smallest unit of matter."
What is atom?
Combining the ingredients needed for a salad in a bowl is considered this type of reaction
What is a physical reaction
This is what holds the atoms in a molecule together
What is a chemical bond
What element does the symbol "Na" stand for?
What is sodium
How many oxygen atoms are contained in the carbon monoxide molecule? (Hint: look at the prefix!)
What is 1
Two or more elements chemically bonded together form this.
What is a molecule
Cutting paper, melting ice, and breaking glass are examples of this type of change because no new substance is made.
What is physical reaction
This is the name of the chart used by scientists as a reference for all the elements along with symbols, atomic weight, etc.
What is the Periodic Table of Elements
In the chemical formula N7H3O4, how many total atoms make up the molecule?
What is 14
How many total atoms are in a single molecule of glucose (C₆H₁₂O₆)?
What is 24
What is the name of the small number in a chemical formula that tells us how many of each type of atom that makes up the molecule?
What is a subscript
When water goes through electrolysis, twice as much volume of this element is collected because of its 2:1 ratio in the chemical formula.
What is hydrogen
What is the element symbol for Gold?
a. Go
b. Au
c. Fe
d. Gl
What is b. Au
What would be the chemical formula for dinitrogen trioxide?
What is N2O3
In the formula for carbon dioxide (CO2), how many total atoms are in the molecule?
What is 3
What does "-lysis" mean?
What is to split or break apart
Why is electrolysis is considered a chemical change rather than a physical change?
What is because chemical bonds are broken and new substances are formed
Is CO2 an element or a compound?
What is a compound
How would you model one molecule of water using colored balls?
What is by using three balls, two representing hydrogen and one representing oxygen
What chemical formula correctly represents a molecule made of 2 Carbon atoms and 4 Hydrogen atoms?
What is C2H4
Name 3 different elements that are not oxygen or hydrogen.
Answers vary.
A student mixes two substances and measures their properties before and after. If a chemical reaction has occurred, what will they observe about the properties of the substances?
What is the properties will have changed and new substances will have formed
How many total elements are on the periodic table?
What is 118