7th Grade-Ch. 1 Sec. 1 Elements and AtomsPresentation Transcript
Ch. 1 Sec. 1 Elements & Atoms
ACTIVITY-NUTS & BOLTS
Assemble as many elements & compounds as you can ( at least 15) from the materials provided.
Draw pictures & name each element & compound.
bolt Bl hex nut Hx 1 bolt & 1 hex nut = BlHx
Activity- Nuts & Bolts Naming elements & compounds *Challenge* Make & name a compound with 6 different pieces of hardware! Picture Chemical Symbol Element or Compound small bolt So E large bolt Bb E hex nut (H) Hx E small bolt + hex nut SbH C small bolt + 2 hex nuts SbH 2 C
Activity- Nuts & Bolts Naming elements & compounds Hardware Picture Chemical Symbol Element or Compound
anything that has mass & takes up space
simplest pure substances
cannot be broken down into any other substances
Elements are the building blocks of matter.
pure substance made of 2 or more elements chemically combined in a specific ratio
2 or more pure substances
not chemically combined
There are two different substances in this mixture.
smallest particle of an element
physical, mental, visual, & other representations of an idea
to help people understand a concept that they cannot observe directly
well-tested idea that explains & connects a wide range of observations
Look in TB on pg. 8 scientist discovery model John Dalton J.J. Thomson negatively charged particles -positively charged particles Ernest Rutherford positively charged nucleus
scientist discovery model Niels Bohr electrons move in certain orbits around nucleus 1920’s scientists electrons can be anywhere in a cloudlike region around nucleus James Chadwick discovered neutron