Metals and Nonmetals
Where are the metals and nonmetals on the periodic table?
Metals are to the left of the "magic staircase", nonmetals to the right of the "magic staircase"
What are the two kind of changes in matter?
Chemical and Physical change
Is breaking a pencil a chemical or physical change?
Physical change.
What is a solute?
What are mettaloids?
What is the only nonmetal on the left side of the periodic table?
Hydrogen
What is the Law of Conservation of Mass?
In a chemical or physical change the total amount of mass does not change.
Matter cannot be created nor destroyed.
Is digesting food in your stomach a chemical or physical change?
Chemical change.
What is a solvent?
Something that does the dissolving?
What does Homogenous mean?
Something that is the same throughout
What are the Noble Gasses and where are they found?
Special elements due to full outer shell of electrons found on the furthermost right column on the periodic table.
If 20 grams of element A is chemically combined with 20 grams of element B, how many grams will compound AB weigh?
40grams.
Is dissolving salt in water a chemical or physical change?
Physical change.
What is Solubility?
The amount of solute that can dissolve in a solvent
Ability to be dissolved
What does heterogeneous mean?
Something that is not the same throughout, its composition is not uniform
What are three characteristics of Nonmetals?
Vary in appearances, insulators for heat and electricity, gain/share or do nothing when forming compounds, low density.
What are two signs you have only a physical change?
Jamie left out a bottle of an unknown liquid because he is irresponsible. Kyle is tasked with disposing of the liquid. Kyle pours some of the liquid over some iron and sees it reacts violently with the iron. What kind of liquid is Kyle working with ?
Some sort of acid since it reacted violently with metals.
What is a solution?
Solute dissolved in a solvent.
What are two characteristics of Bases?
React with nonmetals, taste bitter, and turn litmus paper blue.
What are four characteristics of Metals?
Shiny luster, conduct heat & electricity, lose electrons when combining to form compounds, high density
What are three signs you have a chemical change?
Make or destroy compounds, break old or form new chemical bonds, form new substances with new characteristic properties, usually involves more energy (heat or electricity).
When you combine baking soda and vinegar you get sodium acetate. You also see a large amount of gas bubbling when you combine the two. What is occuring?
A chemical change.
What is concentration?
The amount of solute in a given amount of solvent
What are the three characteristics of acids we talked about?
React with metals, taste sour, and turn litmus paper red