TERMS
Periodic Table
CHANGES
Chemisty
Misc
100
A pure substance that cannot be broken down into any simpler substance.
What is an element
100
the symbol for Nitrogen
What is N
100
chemical or physical change? Rust
chemical
100
How many atoms of each element are found in CH3
1 Carbon 3 Hydrogen
100
Your test is printed on white paper. what type of observation is this?
qualitative
200
A subatomic particle carrying a negative electric charge. It is found outside the neucleus in orbit.
What is an electron
200
How many protons are in an atom of
8
200
Chemical or physical change? chopping wood
physical
200
how many periods are there on the periodic table
7
200
vinegar is a.. a) solution b) element c) mechanical mixture d) compound
What is a solution
300
A particle formed when two or more atoms combine
What is a molecule.
300
How many neutrons are found in a sodium atom.
12
300
chemical or physical change fruit rotting
chemical
300
order the following from left to right as they appear on the periodic table: a) metalloids b)non metals c) metals
metals then metalloids then non metals c, a, b
300
H2O - water is an example of a.... a) solution b) element c) mechanical mixture d) compound
What is d - compound
400
A pure substance made up of two or more elements in a defined proportion (ratio).
What is a compound
400
What is the element that has no neutrons
What is hydrogen
400
to change from a liquid to a gas.
Evaporation
400
name 5 phase changes
melting, evaporation, condenstaion, freezing, sublimation
400
state the lustre and texture of brick
dull, not shiny, rough, not smooth * to be judged by Ms. Smith's opinion!
500
A subatomic particle with no electrical charge, found in the neucleus.
What is a neutron
500
Draw a bohr diagram for calcium.
20 protons 20 neutrons energy level 1 - 2 electrons energy level 2 - 8 electrons energy level 3 - 8 electrons energy level 4 - 2 electrons
500
To change from a solid directly to a gas
What is sublimation
500
When materials are cooled, energy must be ______________ so that the particles _________ ________.
removed, slowed down
500
What was a difference between Rutherfords model and Bohr's Model of the atomic structure of atoms.
Rutherford thought electrons moved anywhere in a defined space around the nucleus. Borh thought electrons moved in defined orbit aroudn the nucleus. Rutherford - electron cloud Bohr - orbit / energy level
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