Mix it up
Salt water is an example of this type of mixture.
What is a solution?
All matter is made from a limited number of these found on the periodic table.
What are elements?
All matter is made of tiny particles called these.
What are atoms?
The periodic table organizes elements by increasing this.
What is atomic number?
A substance with a pH lower than 7 is called this.
What is an acid?
In a solution, the substance being dissolved is called the this.
What is the solute?
When two or more elements chemically combine, they form this.
What is a compound?
The center of an atom is called the this.
What is the nucleus?
Elements in the same column share similar this.
What are chemical properties/ valence Electrons?
Soap is commonly classified as this.
What is a base?
Why is chocolate milk considered a mixture rather than a pure substance?
It contains multiple substances physically combined.
Table salt is made when sodium combines with this element.
What is Chlorine?
Protons have this type of charge.
What is a positive charge?
This family of elements is known for being very reactive metals.
What are the alkali metals?
What happens during a neutralization reaction?
An acid and a base react to form water and salt
Why are compounds considered pure substances?
The contain only 1 type of molecule.
Carbon dioxide contains carbon and oxygen. Is carbon dioxide an element or a compound, and why?
It is a compound because it contains two different elements chemically combined
Compare the charges and locations of protons, neutrons, and electrons.
Protons are positive in the nucleus; neutrons are neutral in the nucleus; electrons are negative in the electron cloud.
Why are the noble gasses generally unreactive?
The have a full outermost ring of electrons. They don't try to gain or lose any electrons.
Why are salts considered compounds?
They are made from 2 different chemically combined elements.
A student claims that all mixtures look the same throughout. Explain why this statement is incorrect.
Some mixtures are homogeneous and look uniform, while others are heterogeneous and have visibly different parts.
A student says, “There are unlimited types of atoms.” Explain why this statement is incorrect.
There are a finite number of elements/atom types on the periodic table, but they can combine in many ways to create many substances.
An atom has 8 protons, 8 neutrons, and 8 electrons. Identify the element and explain why it is neutral.
Oxygen; it is neutral because the number of protons equals the number of electrons.
The lanthanides are the rare earth metals all can be found in nature.
Uranium and Thorium are the only actinides found in nature and all actinides are readioactive.
What type of ions are introduced into solution when you add an acid? when you add a base?
What are positive H ions; negative Hydroxide ions?