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History Of The Atom (set-2)
Test Description: The atom
Instructions: Answer all questions to get your test result.
1) Experiments performed to reveal the structure of an atom led scientists to conclude that an atom's
A
positive charge is evenly distributed throughout its volume
B
negative charge is mainly concentrated in its nucleus
C
mass is evenly distributed throughout its volume
D
volume is mainly unoccupied
2) If a model were made of an atom with the nucleus the size of a pea, how large would the rest of the atom be?
A
the size of a basketball
B
the size of a planet
C
the size of a house
D
the size of a football stadium
3) Suppose a neutral atom were to lose an electron. What would happen to the atom?
A
It would become negatively charged.
B
It would remain neutral.
C
It would become positively charged.
4) To find the mass of an atom you add the protons to the ______________ in the nucleus of the atom.
A
electrons
B
protons
C
atomic number
D
neutrons
5) Different elements have different kinds of atoms. How can you tell an atom of one element from an atom of another?
A
the number of neutrons
B
the number of nuclei
C
the number of protons
D
the number of electrons
6) Which part of the atom is so small it contributes very little to the mass of an atom?
A
electron
B
neutron
C
proton
7) An atom contains 53 protons, 57 neutrons, and 53 electrons. How would you best describe this atom?
A
None of these options.
B
This atom has a neutral overall charge.
C
This atom has a positive overall charge.
D
This atom has a negative overall charge.
8) Compared to the entire atom, the nucleus of the atom is
A
smaller and contains most of the atom's mass
B
larger and contains most of the atoms mass
C
larger and contains little of the atom's mass
D
smaller and contains little of the atom's mass
9) Which statement best describes the law of conservation of mass?
A
In a closed system, the total mass remains constant in a chemical reaction*
B
Mass can be created and destroyed during a chemical reaction
C
Mass is only conserved during physical changes
D
Mass can be converted into energy and vice versa
10) Students measure 2.0g of baking soda and 5.0g of vinegar. They mix them together and watch bubbles form. The mass of the resulting liquid is 6.7g. Based on the law of conservation of mass, what should the mass of the gas that escaped be?
A
.3 g
B
6.7g
C
.5g
D
.7g
*select an answer for all questions
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