History Of The Atom (set-2) Question Preview (ID: 61974)
The Atom.
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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
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 house
c) the size of a football stadium
d) the size of a planet
Suppose a neutral atom were to lose an electron. What would happen to the atom?
a) It would become positively charged.
b) It would become negatively charged.
c) It would remain neutral.
d)
To find the mass of an atom you add the protons to the ______________ in the nucleus of the atom.
a) electrons
b) protons
c) neutrons
d) atomic number
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 protons
b) the number of nuclei
c) the number of electrons
d) the number of neutrons
Which part of the atom is so small it contributes very little to the mass of an atom?
a) proton
b) neutron
c) electron
d)
An atom contains 53 protons, 57 neutrons, and 53 electrons. How would you best describe this atom?
a) This atom has a positive overall charge.
b) This atom has a negative overall charge.
c) This atom has a neutral overall charge.
d) None of these options.
Compared to the entire atom, the nucleus of the atom is
a) smaller and contains most of the atom's mass
b) smaller and contains little of the atom's mass
c) larger and contains most of the atoms mass
d) larger and contains little of the atom's mass
Which statement best describes the law of conservation of mass?
a) Mass can be created and destroyed during a chemical reaction
b) Mass is only conserved during physical changes
c) Mass can be converted into energy and vice versa
d) In a closed system, the total mass remains constant in a chemical reaction*
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) .7g
d) .5g
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