when 2 substances come together to form a new substance
what is a chemical change
100
these are the smallest parts of an element
what is an atom
100
The periodic table goes in order based on...
the atomic number, # of protons, atomic mass of an element
100
most of the elements on the periodic table are this?
metals
100
This man invented the lightning rod
Who is Benjamen Franklin
200
when multiple substances intermingle but no new substance is formed
mixture
200
what are the three particles of an atom and give their charges
what is an electron (-)
proton (+)
neutron (0)
200
the vertical columns are called and what do these elements have in common?
what are groups/families, and they have the same # of electrons in their outer most shell/level/cloud/ring
200
the characteristics of a non metal (name atleast 3)
dull, (not shiny), brittle, do not conduct heat or electricity
200
This man invented the radio
Who is Guglielmo Marconi
300
tearing a piece of paper in half is what kind of change
physical
300
these consist of one kind of atom, such as gold, copper, iron
what are elements
300
These are horizontal rows and the elements in these rows have what in common with each other?
What are periods, and these elements have the same # of rings/levels/clouds, there can be a total of 7.
300
properties of a metalloid
can either have characteristics of a metal or a non metal, they can be shiny but not a good conductor of heat. OR they can be a good conductor of heat and electricity but dull.
300
This man created the phonograph
Who is Thomas Edison
400
rust, bubbling, fizzing, explosions, oxidizing, heat or light being given off, smoke....these are examples of...
chemical reactions
400
when 2 atoms bond together, such as 2 Hydrogens and one Oxygen, they form this
a molecule of water
400
Which group is the most reactive and what is the name of this group, and why are they so reactive?
What is the first group, they are known as the Alkali metals and they are ready to give up an electron
400
find the metalloids on the Periodic Table
staircase
400
This man invented the telegraph
Who is Thomas Edison
500
Adding a light bulb causes what to happen to resistance and current
Why does resistance increase and current decrease
500
When 2 or more different atoms come together, such as Na, and Cl, they form this
what is a compound
500
This group is stable, what group is this and what does it mean if they are stable
what is group 18, noble gasses, and they are stable because they have a total of 8 electrons in their outer shell so they don't react with other elements
500
Most metallic elements are located where?
Most reactive metals are located in what group?