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Vocabulary
Physical or Chemical change?
Who did what?
Name that element
Balancing elections and more
100
The process in which some polar molecules break into ions in water
What is dissociation?
100
Ripping of paper
What is a physical change?
100
Scientist who said electrons exist only in orbits with specific amounts of energy he called energy eleves
Who is Bohr?
100
Which atom has a larger radius? (a) Ra or N? (b) Ne or Xe
What is Ra and Xe?
100
Balance this equation: NaHCO3 (s) = Na2CO3(s) +CO2(g)+H2O(l)
What is 2NaHCO3(s)=Na2CO3+C)2(g)=H2)(l)
200
An ionic compound that contains at least three elements or at least one polyatomic
What is tertiary compound?
200
Reaction to water?
What is a chemical change?
200
A greek philosopher who originated the idea that all things were made of small pieces
Who is Democritus?
200
Which particles has the larger radius? (a) Cl or Cl- (b) Mg or Mg2+
What is Cl and Mg?
200
What type of reaction is this? 4Fe(s) + 3O2(g) = 2Fe2O3 (s)
What is a synthesis equation?
300
The tendency for an atom to attract electrons to itself when it is chemically combined with another element
What is electronegativity?
300
Melting at 68.0 Celsius
What is physical change?
300
Scientist who theorized that an atom was like a bunch of positive stuff, with the electrons stuck in it
Who is Thomson
300
Which element is in period 5 and group 4?
What is Zr?
300
How would you write this equation? Ba(ClO3)2(s) = BaCl2(s)+3O2(g)
What is Barium chlorate sodium heated creating barium chloride solid trioxide a gas.
400
Each element has a unique bright-line emission of light energy that is emitted atoms as they return to ground state
What is emission spectrum?
400
Conductive?
What is physical change?
400
Scientist who said all matter is made of tiny invisible particles called atoms, atoms of the same element are identical, those of different atoms are different elements combined in Whole number ratios to form compounds, chemical reactions involve the rearrangement of atoms
Who is Dolton
400
Which alkali metal is the most reactive?
What is Br?
400
Balance this equation. C5H12(l) + O2(g) = CO2(g) + H2O(g)
What is C5H12(l) + 8O2(g) = 5CO2(g) + 6H2O(g)
500
The refection of a light beam passing through a colloid or suspension which identifies the presence of a suspended particles
What is tyndall effect?
500
Moldy food or rust
What is chemical change?
500
Scientist who formed a new model of the atoms after he fired alpha particles at a thin sheet of gold foil and observed that few particles were deflected so he concluded that an atom is mostly empty space with small, dense, positive nucleus.
Who is Rutherford?
500
Which group of elements reacts violently with water?
What is group one?
500
What type of reaction is this? 2NaHCO3(s)=Na2CO3+C)2(g)=H2)(l)
What is Decomposition?