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Ps Ch 4
Test Description: Atomic theory
Instructions: Answer all questions to get your test result.
1) A subatomic particle that has a negative change is called a(n)
A
element
B
electron
C
compound
D
molecule
2) Who determined that atoms could be divided
A
Rutherford
B
Dalton
C
Thomson
D
Democritus
3) Thomson made his discovery about the atom during an experiment using
A
x rays
B
cathode rays
C
kinetic energy
D
thermal energy
4) Thomson is responsible for discovering that an atom contains
A
anodes
B
electrons
C
molecules
D
a nucleus
5) Which of the following statements is NOT true
A
protons have a positive charge
B
nucleus has a positive charge
C
neutrons have a negative charge
D
neutrons have no charge
6) What is an atom's nucleus made of
A
only protons
B
only neutrons
C
protons and neutrons
D
anodes
7) In ____________ atomic model, negative electrons orbit the positively charged nucleus
A
Rutherford
B
Dalton
C
Thomson
D
Democritus
8) Whose model determined that an atom's positive energy is concentrated at the atom's center
A
Democritus
B
Thomson
C
Dalton
D
Rutherford
9) What is the mass of 2.5 mol of Ca, which has a molar mass of 40 g/mol
A
40.0 g Ca
B
100 g Ca
C
2.5g Ca
D
20.0 g Ca
10) What is the amount of nickel, which has an average atomic mass of 58.7 u, present is 525 g nickel
A
8.90 mol
B
58.7 mol
C
525 mol
D
28.0 mol
*select an answer for all questions
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