Unit 1
How is the work of scientists checked for accuracy?
Scientists submit their work to scientific journals, where it is checked by other scientists.
How do scientists use the kinetic theory of matter?
They use it to study the effect of energy on matter.
List the elements found in Period 2 of the periodic table?
Oxygen, fluorine, neon
What identifies a scenario that displays evidence a chemical reaction is occurring?
Sugar burns and turns black (anything similar)
How do the particles of a suspension compare to the particles of a colloid?
They are larger than the bags of a colloid.
What happens during a controlled experiment?
The results for changing the IV are observed.
Using Boyle’s law, how would you reduce the volume of a gas?
Increase its pressure.
How are the elements in the current periodic table arranged?
By atomic number
What is a clue of a reaction having the slowest reaction rate?
It has the least amount of particles.
What mixture can be separated by using a filter?
A mixture including a solid and a liquid.
Which unit is an SI base unit?
Kilograms
The atomic number of sulfur is 16.
If an atom of sulfur is neutral, how many electrons should it have?
16
Which elements share the same number of energy levels?
Potassium, Bromine
Which radioactive isotope is commonly used to date wooden artifacts?
Carbon-14(^14C)
What is an example of a colloid?
Fog
In what group and period of the periodic table is Carbon (C) located?
Group 14
Period 2
What must happen in order for an atom to become a positively charged ion?
It must lose an electron.
List the correct chemical name for AlN?
Aluminum Nitride
Organize the types of radiation from the largest particles to the smallest.
alpha | betta | gamma
Which type of mixture is likely to separate if it is allowed to sit still?
Suspensión
What can be used to best describe elements?
Pure substance
What does the mass number of an element represent?
What is the chemical name of CS2
Carbon disulfide
Which kind of nuclear decay does not alter the identity of the atom?
gamma
What is an example of an alloy.
A metal cooking pot ( or something like that)