Density
Metals, Non metals, and metalloids
Elements vs compounds
Physical properties grab bag
Physical vs chemical changes.
100
What is the Formula for Density?
Density = mass divided by volume
100
Where are metals found on the periodic table?
On the left of the stair step.
100
True or false. OHCl is a compound.
True OHCl has 3 capital letters so that means there are 3 different elements inside it. combination of elements is what a compound is.
100
What are 3 minerals quartz cannot scratch?
Corundum, Topaz, and Diamond because they all have a harder value.
100
Name two signs of a chemical change
Any two
Production of a gas
Change in color
Odor
New substance formed
precipitate formed
change in temperature
200
If you have an object with a mass of 30 grams, and a volume of 120 cm3. what is it's density?
0.25 remember mass divided by volume
200
I have an object that is conductive, shiny and malleable. It is most likely a ... metal, non metal or metalloid?
metal. conductive, shiny and malleable are all properties of elements.
200
CO represents a compound or an element?
A compound because it has two capital letters. it is carbon and oxygen rather than copper
200
The color of something left behind on a streak plate after sliding it over one is...Vocab Word
Streak
200
Identify if the substance has formed a chemical change or not.
This reaction is physical because they retained their physical properties.
300
How do you find the volume of an irregular object?
Liquid displacement/measuring water levels
300
I have a brittle conductor this object is most likely a... metal, nonmetal, or metalloid?
metalloid because it has the property of brittle which is from non metals conductive which is a property of a metal. it has properties of both metals and non metals so it is likely a metalloid.
300
There are three statements which ones are true for elements?
1.Are pure substances made up of two or more different things
2.Are represented by a chemical symbol like O or He
3. cannot be broken down chemically into anything smaller
2 and 3 are true for elements,
Elements are represented by chemical symbols found on the periodic table.
They cannot be broken down further by chemical means.
1 is not true because elements are only one kind of thing. Compounds are pure substances made up of two or more elements.
300
Some thing that is reflective is...
Lustreous/ has luster/ is shiny
300
Did a chemical reaction occur in this scenario
Chemical reaction the temperature lowered.
400
I place an object in water. The water level starts at 73ml and ends at 89ml. What is the volume of the object?
16 ml it is the difference or the change in water level. so 89-73 = 16
400
I have a dull object that breaks easily. this object is most likely, a metal, nonmetal, or metalloid
nonmetal. because dull means not shiny or not lustreous and it breaks meaning it's brittle. those are both properties of non metals.
400
H2O represents a compound or an element?
A compound because there are two different chemical symbols inside the formula H and O.
You can tell that because both H and O are capitalized
Chemical symbols never have two capital letters.
400
Something that can be hammered into sheets, or bent without breaking is...
Malleable
400
Did a chemical change occur in this scenario
This is a physical change because the color change was something that was already there. Food coloring in water the color was in the foodcoloring it just spread out. phenol red is a kind of food coloring.
500
I have a cube with a side length of 2cm. and a mass of 20 g. what is it's density?
2.5 g/cm3 it is a cube so use length times width times height to find the volume then divide the mass by the volume.
500
I have a semi conductor. this is most likely a metal, non metal, or metalloid.
metalloid. semiconductor is specific to metalloids.
500
Which of the following is an element?
CO
He
C2H4
FC
He is an element because it only has one capital letter making it a chemical symbol.
500
Something that carries heat and electricity poorly is a...
Insulator/ not conductive.
500
Did a chemical change occur in this scenario?
This is a chemical change the temperature changed when you mixed the solutions.