Elements
An element is made up these?
What are atoms.
CO2 is the Formula for what Compound
What is Carbon Dioxide
This is a combination of two or more substances that are physically combined and can be separated by physical means.
What is a mixture?”
This type of change produces a new substance with new properties.
“What is a chemical change?”
This scientific law states that matter cannot be created or destroyed during a chemical reaction
“What is the Law of Conservation of Mass
There are 118 Known Elements, but this one is the central element to all living organisms
What is Carbon
Two or more elements that are bonded to each other
What is a Compound
When salt dissolves evenly in water, it forms this type of homogeneous mixture.
What is a Solution
Bubbling, color change, temperature change, or the formation of a solid are signs that this has happened.
What is a Chemical Reaction
In a chemical reaction, the total number of these must be the same on both sides of the equation.
What are Atoms
Hg is the Symbol for what Element
What is Mercury
Water (H₂O) is made from these two elements combining in a 2:1 ratio.
What are hydrogen and oxygen?”
Name one method you could use to separate sand from water in a mixture.
“What is evaporation?”
In a chemical reaction, the number of atoms of each element must be the same before and after the reaction. This process of making both sides equal is called what?
“What is balancing the chemical equation?”
If 10 grams of hydrogen react with 80 grams of oxygen, the total mass of the water produced must be how many grams?
What is 90 grams
This element's symbol is Au and has 79 Protons
What is Gold
This is the chemical formula for table salt, a compound formed when sodium reacts with chlorine.
What is NaCl?”
This type of mixture has visibly different parts, like a salad or trail mix.
What is Heterogenous
When vinegar reacts with baking soda to produce carbon dioxide gas, this is the type of change that occurs.
“What is a chemical change (chemical reaction)?”
Scientists balance chemical equations to show this principle.
“What is the conservation of mass?”
What is Hydrogen
When elements form a compound, their properties change completely. For example, sodium is explosive in water, and chlorine is poisonous
What is table salt (sodium chloride)?”
When you mix oil and water, the two liquids separate instead of forming a uniform mixture. This shows that oil and water form this type of mixture.
“What is a heterogeneous mixture?”
According to this scientific law, matter cannot be created or destroyed during a chemical reaction.
“What is the Law of Conservation of Mass?”
When wood burns, it seems to lose mass, but the missing matter has actually turned into gases that float into the air. This shows that matter is not destroyed, but instead it does this.
What is changes it's state?