Atoms
Element Key basics
The Periodic Table
Elements
Vocabulary
100
smallest part of an elements that can be identified as that elements
What is an atom?
100
the number of protons (or electrons!) in the nucleus of an atom
What is the atomic number?
100
the periodic table is organized according to this
What is atomic number?
100
simple substances that cannot be broken down into simpler substances
What are elements?
100
positively charged particle in an atom
What is proton?
200
an element ___________ be broken down into simpler substances
What is cannot?
200
the number of protons is always the same as the _________
What is number of electrons?
200
vertical column of elements in the periodic table
What is group?
200
has luster, good conductor of heat, malleable, ductile
What is metal?
200
negatively charged particle in an atom
What is electron?
300
the center of an atom
What is nucleus?
300
shorthand way of writing the names of elements
What are chemical symbols?
300
horizontal row of elements in the periodic table
What is period?
300
shares some properties with metal and some with nonmetal
What is metalloid?
300
silvery solids with low densities and low melting points
What is alkali metals?
400
3 particles in an atom
What are protons neutrons and electrons?
400
the total mass of the protons and neutrons in an atom
What is atomic mass?
400
Group 18 is known as this
What is noble gases?
400
Groups 1 & 2, 13-18
What are representative elements?
400
denser, harder and higher melting point than alkali metals
What is alkaline earth metals?
500
the location of the protons and the neutrons
What is the nucleus?
500
the number of neutrons is figured out this way
What is subtracting the atomic # from the atomic mass?
500
Group 1 is known as this
What is alkali metals?
500
the metals in the middle, groups 3-12
What are transition elements?
500
rarely combine with other elements, found only as uncombined elements in nature
What are noble gases?
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