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Define matter.
anything that takes up space and has mass
What are the building blocks of matter?
atoms
These are smaller than atoms...
subatomic particles
What is the subatomic particle count of a neutral Hydrogen atom?
p+ = 1
n0 = 0
e- = 1
Define valence electron.
the electrons on the outermost shell of an atom
Which element is in both Group 16 and Period 6
Polonium
What's special about Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, and Iodine?
They are naturally diatomic.
What the different parts of an atom?
nucleus and cloud
What lives in the nucleus of an atom?
protons and electrons
What lives in the shells of an atom
electrons
An element's valence electron count is equal to the _______ that it is in.
group
Wha is the largest number of shells that an atom can have?
7
The number of energy levels that an element has is equal to the _______ that the element is in.
period
Name the subatomic particles.
protons, neutrons, and electrons
What is the subatomic particle count of a neutral Aluminum atom?
p+ = 13
n0 = 14
e- = 13
What is the difference between the atomic mass and the atomic number?
atomic number = protons and electrons
atomic mass = protons + neutrons
What is the name of the group of elements that are highly unreactive?
noble gases
pure substances are _______ bonded, while mixtures are _______ bonded.
chemically; physically
What are Protium, Deuterium, and Tritium?
isotopes of Hydrogen
Between Magnesium, Germanium, and Sulfur, which element is most likely to give up an electron?
magnesium
What is the subatomic particle count of a neutral Iridium atom?
p+ = 77
n0 = 115
e- = 77
Why are atoms considered the smallest unit of matter?
This is the smallest level that upholds the properties of the element.
What are the 3 different groups that scientists believe Hydrogen should be in?
Groups 1, 4, and 7
which trend goes...
up and to the right
electronegativity
which trend goes...
down and to the left for metals; up and to the right for nonmetals...
reactivity