History of Chemistry
Who were the first people to propose that matter was made of atoms?
Greeks
Sodium
Na
Chemistry is the study of ______________________ and the changes that it undergoes.
Matter
hydrogen peroxide, H2O2
Compound
The freezing point of nitrogen is -210 °C. What would that temperature be in kelvins?
63.15 K
The Persian alchemist who contributed much to laboratory practices was
Jabir ibn Hayyan
Cu
Copper
What is matter?
Anything that takes up space and has mass
phosphorus, P4
Polyatomic
When water vapor forms dew on the grass, a phase change called _______________ has occurred.
condensation
The first professor of chemistry in the United States was
Benjamin Rush
Iron
Fe
What is measuring?
the act of comparing an unknown quantity to a standard unit
Sweetened tea
Homogeneous
Reactions that absorb energy are ______________
exothermic
The physicist who first formed carbon nanotubes was
Sumio Iijima
Phosphorous
P
What is the evaluation of how close the measured value is to the actual or accepted value of the dimension measured?
Accuracy
iron, Fe
Monatomic
Is color a physical or chemical property?
Physical
What was the most important contribution made to modern chemistry by alchemists?
experimental approach
Mg
Magnesium
What is an ion?
A charged atom
oxygen, O2
diatomic element
Which of your classmates is sodium?
Emma