Elements
Definitions
Count those Atoms
Classifying Matter
Compounds and Molecules
100
K
What is potassium
100
the original substance is changed into one or more substances
What is a chemical reaction
100
neutrons, protons and electrons
What are the three subatomic particles of an atom
100
solid, liquid and gas
What are the three states of matter
100
elements can make a specific number of connections with other elements
What is elements combining capacity
200
metals
What is on the left side of the periodic table
200
the sum of the protons and neutrons
What is the mass number
200
has a negative charge
What is an electron
200
a substance that contains only one type of atom or molecule
What is a pure substance
200
metals combine with non-metals
What is compounds
300
groups
What is the vertical columns called on a periodic table
300
a pure substance that cannot be broken down
What is an element
300
a scientist who helped develop the model of the atom we have today
Who is Niels Bohr
300
consists of two or more pure substances
What is a mixture
300
when two or more atoms join together
What is a molecule
400
an element that has an atomic mass of 40
What is calcium
400
a substance reacts rapidly with oxygen and releases energy
What is combustion
400
2, 8, 8
What is the maximum number of electrons in the first three orbits
400
a mixture that looks and feels like it is made of only one substance
What is a homogeneous mixture
400
when two molecules join
What is a chemical bond
500
an element that has 19 neutrons and 17 protons
What is chlorine
500
the person who organized and arranged the elements into the periodic table
Who is Dmitri Mendeleev
500
35 Cl 17
What is the standard anatomic notation for chlorine
500
you can see different kinds or substances in a mixture
What is a heterogenous mixture
500
NaCl
What is salt
M
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