What is chemistry?
Physical vs. Chemical
Classifying Matter
Atomic Structure
atoms and moles
100
Any substance that has a definite composition.
What is a chemical
100
a change in state, such as melting, and boiling are examples of this type of change.
What is physical
100
This is the smallest unit of an element that maintains the properties of that element.
What is an atom
100
The three subatomic particles
What are protons, neutrons, electrons
100
the number of molecules or atoms in one mole of anything
What is 6.022 x 10^23
200
In a chemical reaction these are usually on the right-hand side. They are what you end up with.
What are products
200
two examples of a chemical change
What is (answers may vary)
200
Copper, Polonium, Argon, are all examples of these pure substances
What are elements
200
The dense central portion of an atom that contains all the positive charge and almost all of the mass.
What is the nucleus
200
When an electron gains energy, it moves to this state
What is the excited state
300
You measure this with a balance
What is mass
300
three examples of a physical change
What is (answers will vary)
300
Pure substances that are made up of two or more different elements that are chemically bonded
What are compounds
300
The number of proton that an atom has. Always the same for each element.
What is atomic number
300
The electron configuration for Chlorine (Cl)
What is 1s2 2s2 2p6 3s2 3p5
400
The set/system of units used by scientists worldwide.
What are SI units
400
This has formed when two clear solutions mix and turn cloudy
What is a precipitate
400
They come in homogeneous, or heterogeneous and are not chemically combined
What are mixtures
400
This is equal to the number of particles in the nucleus.
What is the mass number/atomic mass
400
The mass in grams of 10.5 mol of nickel.
What is 616g
500
the state of matter that contains the particles with the most random motion
What is a gas
500
reactivity (i.e. with oxygen, light, or acid) is an example of what type of property?
What is chemical
500
A solid mixture of different metals
What is an alloy
500
Lead-204, and Lead-206 are examples of these. They have the same atomic number, but different atomic masses.
What are isotopes
500
The amount of atoms in 0.70mol of Francium
What is 4.2 x 10^23 atoms
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