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The Atom
The Atom
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A #chemistry #blindquiz to introduce #theatom and #electrons to high school students.
Flashcards
18 cards
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Questions
18
Answers
1
Who conducted experiments to determine the quantity of charge carried by the electron?
Millikan
Thomson
Rutherford
Dalton
2
Which of the following is NOT true?
neutrons are located in the nucleus of an atom
protons have a positive charge
electrons are negatively charged and have a mass of 1 amu
the nucleus of an atom is positively charged
3
The atomic # of an element is the total # of which particles in the nucleus?
protons
electrons
neutrons
protons and electrons
4
Which of the following equals one atomic mass unit?
the mass of one carbon-12 atom
one-twelfth the mass of one carbon-12 atom
the mass of one helium-4 atom
the mass of one electron
5
The nucleus of an atom is ...
the central core and composed of protons and neutrons.
negatively charged and has a low density.
negatively charged and has a high density.
positively charged with more protons than neutrons.
6
Isotopes of the same element have different ...
numbers of electrons
numbers of neutrons
atomic numbers
numbers of protons
7
Which of the following was NOT among Democritus's ideas?
Matter consists of tiny particles called atoms.
Atoms retain their identity in a chemical reaction.
Atoms are indestructible.
Atoms are indivisible.
8
Which of the following is true about subatomic particles?
Protons are positively charged and the lightest.
Electrons are negatively charged and the heaviest.
Neutrons have no charge and are the lightest.
The mass of a neutron nearly equals the mass of a proton.
9
How is the # of neutrons in the nucleus of an atom calculated?
add the # of electrons and protons together
subtract the # of protons from the mass #
add the mass #to the number of electrons
subtract the # of electrons from the # of protons
10
What does the number 84 in the name krytpton-84 represent?
twice the number of protons
the atomic number
the sum of the protons and electrons
the mass number
11
The atomic mass of an element depends upon the ...
mass of each electron in that element
mass and relative abundance of each isotope of that element
mass of each isotope of that element
relative abundance of protons in that element
12
Dalton's atomic theory included which idea?
Atoms of the same element are identical.
Individual atoms can be seen with a microscope.
All atoms of all elements are the same size.
Atoms of different elements cannot combine.
13
Using the periodic table, determine the # neutrons in
16
O.
4
24
8
16
14
Isotopes of the same element have different ...
mass numbers
positions on the periodic table
atomic numbers
chemical behavior
15
Who was the man who lived from 460 B.C. - 370 B.C. and first suggested the idea of the atom?
Democritus
Atomos
Dalton
Thomson
16
All atoms are ...
positively charged, with more protons than electrons.
neutral, with the same number of protons & electrons.
negatively charged, with more electrons than protons.
neutral with equal number of protons, electrons, & neutrons.
17
How does the energy of an electron change when it moves closer to the nucleus?
It increases
It stays the same
It doubles
It decreases
18
What unit is used to measure weighted atomic mass?
amu
gram
angstrom
nanogram
