Elements vs Compounds
True or False: Salt (NaCl) is an element
False
Which of these is a mixture?
A: Water, H2O
B: Lemonade
C: Oxygen, O2
D: Carbon dioxide, CO2
b. lemonade
What is the unit for mass?
grams
Conducts electricity
metals
What is the phase change from solid to liquid?
Melting
Which of these is a copper sulfide?
A: copper
B: copper sulfide
C: sulfur
B: copper sulfide
Which are combined chemically at the atomic level, mixtures or compounds?
compounds
What is the formula for density?
Mass/Volume
Are brittle
nonmetals
This state of matter has a definite shape, but no definite volume.
liquid
Compounds are made of more than one -----
Elements
Which can be separated easily, mixtures or compounds?
mixtures
On the density triangle: what is located at the top of the triangle?
Mass
Are malleable
metals
Which of these is chemical change?
A. rusting
B. making crystal light
C. opening a soda
rusting
Between elements, compounds, mixtures, which are pure?
elements and compounds
Made from chemically combining two or more elements
Compounds
What are the units for density of regular objects?
g/cm3
Found between the metals and non metals (example: silicon is brittle and conducts electricity)
metalloids
Chemical change is different than physical change because they form what?
new stuff