Periodic Table
What is the difference between periods and groups on the periodic table? How many of each are there?
Periods are the rows, groups are the columns.
7 periods, 18 groups
What is an atom? What is a molecule?
-A molecule is when 2 or more atoms chemically combine
What is matter? What are the 3 main states of matter? *BONUS 50 points if you can tell me the 4th state of matter*
-Matter is everything that has mass and volume
-Solid, Liquid, Gas, Plasma
What is the formula for density?
Density = Mass/Volume
What is a physical change?
A change in the size, shape, form, or state of matter that does not change the matter's identity
What is a metalloid?
An element that shares properties with both non-metals and metals
What are the 3 subatomic particles, their charges, their masses, and their locations?
Proton- positive, 1 AMU, nucleus
Neutron- no charge, 1 AMU, nucleus
Electron- negative, 0 AMU, electron cloud
What are the two types of mixtures?
Homogenous and heterogenous
If an object is more dense than the solution it is placed in, does the object float or sink?
Sink
What is a chemical change?
A change in matter in which the substances that make up the matter change into other substances with different chemical and physical properties. The identity of the matter changes.
Most of the elements on the periodic table are _________.
Metals
(another acceptable answer is: solids)
What is the model called the illustrates an atom and its subatomic particles?
Bohr Model
How are homogenous and heterogenous mixtures different? How are they similar?
Both are made of multiple pure substances not chemically combined with each other. Heterogenous you can typically see the different parts and separate with your hands. Homogenous you typically cannot see the different parts.
What is the difference between mass, weight, volume?
What is the law of conservation of mass?
Matter cannot be created or destroyed. Mass will be conserved- the total amount of mass before a chemical change will equal the total amount of mass after a chemical change.
What is an element? What is the difference between an element and an atom? What is a compound?
An element is a pure substance.
Atoms are actual particles; elements describe what kind of material/substance it is.
A compound is when a molecule has different elements in it. (Different types of atoms bonded together chemically)
What does APE MAN stand for, and what is the purpose of it?
A- Atomic Number, P- Protons, E- Electrons, M- Mass Number, A- Atomic Number, N- Neutrons
The purpose is to easily calculate the number of protons, neutrons, and electrons in an atom of any given element.
What is the only way you can physically separate a pure substance?
Trick question! You can only chemically separate pure substances.
Is ice, liquid water, or water vapor the least dense? Why?
Water vapor is the least dense because gas H20 particles are most loosely packed.
What are some things that could be signs of a chemical change?
-Production of a gas
-Change in thermal energy
-Production of a precipitate (solid that forms from two liquids chemically combining)
-Color changes
What are the 4 things featured on each element square?
1. Element/chemical symbol
2. Element/chemical name
3. Atomic number
4. Atomic mass
Tell me at least one part of atomic theory.
All matter is composed of atoms
Atoms of a given element are identical in mass and properties, so different elements have different atoms
Atoms combine in whole-number ratios to form compounds
Atoms cannot be created or destroyed, only re-arranged
Give an example of a pure substance, a homogeneous mixture, and a heterogenous mixture.
Answers will vary.
Calculate the density: mass= 48.6 g, volume= 100 ml.
0.486 g/ml
Give examples of both a physical change and a chemical change.
Answers will vary.