Density
What is needed to calculate density and what is the formula?
Mass and Volume.
D=M/V
What are elements? What are compounds?
Elements are pure substances made of one type of atom that can't be broken down. Compounds are pure substances made of two or more elements.
What is longer? 10km or 100,000m
100,000m
What is a physical change?
What leter in the chemical symbol is always lowercase?
The second letter.
What is the density of an object that has a volume of 7ml and a mass of 56g
8g/ml
How do you determine the number of elements in a compound? How many Elements are in the compound NaHCO3
Count the capital letters. 4
Define Volume.
The amount of space an object takes up.
What is a chemical change?
A change in a substance that forms a new substance
Define a mixture.
Made of different types of molecules that are not chemically combined.
Calculate the density of a box with the dimensions 10cm x 5cm x 2cm and a mass off 1,500g
15g/cm3
What is the smallest particle of matter?
The Atom
A rock was dropped into 22ml of water and rose it up to 58. What is the volume of the rock?
36ml
True or false: chemical changes can be reveresed through physical changes.
False
What element is present in all four of Earth's spheres?
Oxygen
A ball with a mass of 27 grams was dropped into a graduated cylinder and raised the volume from 50ml of 59ml. What is it’s density.
3g/ml
What three things can you find out about an element by looking at the periodic table?
Name, symbol, and atomic number
What tools are used to find an objects volume.
Graduated cylinder and a ruler
What must happen in every chemical reaction?
A new substance must be formed
Not including Oxygen, what are the most abundant elements in each sphere?
Atmosphere-Nitrogen Hydrosphere-Hydrogen
Lithosphere-Silicon Biopshere-Carbon
In what order would the following liquids be layered from top to bottom in a graduated cylinder?
Water (1g/ml)
Milk (1.03g/ml)
Corn Syrup (1.33g/ml)
Baby Oil (0.83g/ml)
Baby Oil, Water, Milk, Corn Syrup
What properties of elements are used to identify metals, nonmetals, and metalloids
Malleability, conductivity and luster/shiny
Find the volume of a box with the dimensions 11m x 7m x 3m
231m3
What are the five pieces of evidence of a chemical change?
Production of gas, production of light/heat, formation of a precipitate, color change, and temperature change.
How many naturally occuring elements are there?
92