Vocabulary
What is the smallest part of an element
atom
What are three characteristics of metals
Hard
Shiny
Ductile (can be pulled into a thin wire)
Malleable (can be hammered thin)
Electrically Conductive
Often Magnetic
Solids
High Melting Point
Dense
What is the total number of protons and neutrons in the nucleus of an atom
mass number
What makes up our bodies, our world, our sun, and in fact, the entire universe?
elements
What is a positively charged particle?
proton
What is a pure substance made of only one kind of atom?
element
What are 3 characteristics of non-metals?
Dull appearance
Brittle
Not ductile or malleable
Low Density
Low Melting Point
Poor Conductors
What is The number of protons in an atom.
atomic number
How many natural elements are there?
How many were created in a lab?
92
26
What is a subatomic particle that has no charge and that is found in the nucleus of an atom?
neutron
What is 2 or more atoms held together by a convalent bonds.
molecule
Is He (Helium) a metal or nonmental
nonmetal
What is A horizontal row (left to right) of elements in the periodic table.
period
Protons and neutrons are grouped together to form the “center” of the atom known as the.....
nucleus
What is A subatomic particle that has a negative charge and found outside the nucleus.
electron
force that holds atoms together in a compound
bond
What has the characteristics of metals and nonmetals. They can conduct electricity.
Metalloids
What is a vertical column of elements in the periodic table
family/group
On the periodic table of elements there are ______ groups and families
18
What is substance made up of atoms of two or more different elements joined by chemical bonds?
Compound
Atoms of the same element that have different numbers of neutrons
isotope
Name an element on the periodic table of elements and tell me if it is a metal, nonmetal or metalloid?
See Periodic Table of elements
On the periodic table of elements have similar physical and chemical properties.
groups/families
Who was the man that created the periodic table of elements?
Mendelev
What is a unit of mass equal to one-twelfth the mass of a carbon-12 atom
atomic mass unit (amu)