7.1
7.2-7.4
7.5
8.1, 8.2
8.3, 8.4
100
What is B?
electron
100
What is the name of a model that was developed by JJ Thomson
Plum Pudding model
100
What is the other name for nucleon number?
Mass number
100
Substance has ______ type of substance.
one
100
What is the name of this method
Chromatography
200
What is A and C?
A; proton;
B: neutron
200
Name the scientist that developed this model.
JJ Thomson
200
What is the other name for proton number?
Atomic number
200
Which one is pure substance? X or Y?
X
200
Which pure dyes is the least soluble?
red
300
A boron atom has 5 protons and 6 neutrons. Give its number of electrons.
5
300
Name the scientist that developed this model.
Ernest Rutherford
300
What is Z?
atomic number/proton number
300
State the melting point;
45 degree celcius
300
Which beaker is more concentrated, the left or the right?
left
400
State the chemical name of element that has 19 electrons.
potassium
400
What is the difference this model compared to plum pudding model.
This model has a nucleus, while the plum pudding model does not.
400
Sodium has 23 mass number, 11 atomic number Write as ;
400
What is the name of the process that use this apparatus;
distillation
400
Calculate the concentration of 100g salt in 200 cm3 solution.
0.5 g/cm3
500
State the chemical symbol of element that has 18 protons.
Ar
500
Compare the nucleus in this model with the nucleus in the modern atomic model. State one similarity,
Both of them has positively charge nucleus
500
Magnesium has 12 electrons, 12 neutron, write as;
500
What is the change of state that happened in condenser?
condensation
500
Calculate the concentration of 400g salt in 200 cm3 solution.
2g/cm3