Atoms and Molecules
Elements and Compounds and Mixtures
Solids, Liquids, Gases, and Plasma
Physical and Chemical Properties and Changes
Periodic Table
100
The basic building blocks of all matter.
What is an atom?
100
Forms when two or more substances combine without joining together chemically.
What is a mixture?
100
Has no definite shape or volume; the molecules are far apart; energy binding particles are weak.
What is a gas?
100
Mass divided by volume.
What is density?
100
Is the basis for arranging the elements in the modern periodic table.
What is number of protons?
200
A pure substance that cannot be broken down into simpler substances by ordinary chemical means.
What is an element?
200
Code that uses chemical symbols and subscripts to identify the number and types of atoms of each element.
What is a chemical formula?
200
Has a definite shape and volume; particles are densely packed; and the energy binding particles are very strong.
What is a solid?
200
Reactivity, combustibility, flammability.
What is NOT a physical property?
200
Elements in the same column (family or group) have in common?
What is similar chemical properties?
300
Subatomic particles that are located in the nucleus.
What is a proton and a neutron?
300
Has a homogeneous composition that cannot be broken down or separated by using physical means.
What is a pure substance?
300
Has no definite shape but a definite volume; particles are close together and has a very strong binding energy.
What is a liquid?
300
Burning, rusting, baking, combustion are examples.
What is a chemical change?
300
Atomic numbers (protons) are increasing.
What is moving from left to right on the periodic table?
400
Gives the number of protons located in the nucleus.
What is the atomic number?
400
Two or more atoms that are bonded together chemically.
What is a molecule?
400
The temperature at which a liquid turns to a solid OR the temperature at which a solid turns to a liquid.
What is the freezing point and the melting point?
400
Melting, boiling, tearing, breaking, cutting, evaporating,freezing.
What is a physical change?
400
During a chemical reaction matter cannot be created or destroyed, the atoms are just rearranged.
What is the Law of Conservation of Matter?
500
The sum of the protons and neutrons located in the nucleus of an atom.
What is the atomic mass?
500
Small number written to the right and slightly below a chemical symbol to tell the number of atoms of that element in the substance
What is a subscript?
500
The changing of a substance from a gas to liquid because of a loss of energy from the particles.
What is condensation?
500
A solid that forms from a chemical reaction that takes place in a solution.
What is a precipitate?
500
Electrons located in the outermost energy level of an atom that are involved in chemical reactions.
What is a valence electron?
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