Show:
Elements/Compounds
Elements/Compounds
Elements in Earth
Density
Mass, Volume, Density
100
An element is a ______________substance
pure
100
What side of the stair step are the metals located on the periodic table?
Left
100
What element is found in all 4 components of the earth (crust, atmosphere, oceans and living things)?
Oxygen
100
Which tool do you use to measure mass?
tripple beam balance
100
The amount of matter in an object is its ____________?
mass
200
An element is represented by a ____________ on the periodic table. Example: C, O, Ca
Chemical Symbol
200
How many elements are in the compound CHO?
3
200
Which 2 elements make up the majority of Earth's atmosphere?
Nitrogen Oxygen
200
To find the volume of an irregular solid, you should drop it into a graduated cylinder and use the _____________ method
displacement
200
The amount of space an object takes up is its _______________?
Volume
300
Is NaCl an element or compound
compound
300
How many atoms are in the below reaction: Mg + Cl -----> MgCl
4
300
Which 2 compounds make up the majority of the oceans?
Water H2O Salt NaCl
300
The volume of a nail is 5mL and its mass is 50g. What is the density of the nail?
D= 50/5 = 10
300
What is the formula for density?
D=m/v
400
How many elements are in this chemical reaction Na + Cl --------> NaCl
2
400
Explain the difference between an element and a compound.
An element is a pure substance while a compound is made of 2 or more different elements.
400
What 3 elements make up the majority of living things?
Carbon Oxygen Hydrogen
400
The volume in a graduated cylinder is 12ml. When you drop in a rock, the volume rises to 15ml. The mass of the rock is 12g. What is the density?
volume = 15-12= 3 D = 12/3 D= 4
400
M=500 g V=50 mL D=?
500/50=10 g/mL
500
How many elements are in the formula below? Name the elements: NaHCO3
4 Sodium, Hydrogen, Carbon, Oxygen
500
Compound Number of Atoms per Molecule Carbon Hydrogen Oxygen Glucose 6 12 6 Fructose 6 14 7 What do both sugar molecules have in common?
The type of atoms or elements in each molecule
500
Almost all of the weight of living things consists of how many elements? (Hint: Use the reading)
6 oxygen, carbon, nitrogen, hydrogen, phosphorus, and calcium
500
Find the density of a cube that measures 2 inches per side and has a mass of 24g.
3g/cm
500
M=60 g D= 10 g/mL V=?
V=M/D V= 60 g/ 10g/mL V= 6 mL