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Chem 1 Chapter 3 Flashcards | StudBud
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Chem 1 Chapter 3
The number of atoms in 1 mole of carbon is
Fluorine-17 (atomic number 9) contains
Chem 1 Chapter 3
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chem 1 chapter 3
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1
Fluorine-17 (atomic number 9) contains
8 protons
17 neutrons
17 protons
8 neutrons
2
The number of atoms in 1 mole of carbon is
6.022 x 1022
5.022 x 1022
5.022 x 1022
6.022 x 1023
3
Avogadro's number is
the number of protons and neutrons in the nucleus
maximum number of electrons that the atom will hold
the number of particles in one gram of a pure substance
the number of particles in one mole of a pure substance
4
The total number of protons and neutrons in the nucleus of an atom is its
atomic number
average atomic mass
Avogadro's number
mass number
5
The average atomic mass of an element is the average of the atomic masses of its
naturally occurring isotopes
radioactive isotopes
artificial isotopes
two most abundant isotopes
6
An atom is electrically neutral because
the numbers of protons and neutrons are equal
the numbers of protons and electrons are equal
neutrons balance the protons and electrons
nuclear forces stabilize the charges
7
Sodium has an atomic number of 11 and an atomic mass of 23. It has
23 protons, 23 electrons, and 11 neutrons
12 protons, 12 electrons, and 11 neutrons
11 protons, 11 electrons and 12 neutrons
11 protons, 11 electrons and 34 neutrons
8
Atomic number of neon is 10, calcium is 20. Compared with a mole of neon, a mole of calcium has
half as many atoms
an equal number of atoms
twice as many atoms
20 times as many atoms
9
The nucleus of an atom has all of the following characteristics except that it
is very dense
is positively charged
contains nearly all of the atom's volume
contains nearly all of the atom's mass
10
A carbon isotope contains 6 protons, 8 neutrons, and 6 electrons. What is its mass number?
14
12
6
8
11
The smallest unit of an element that can exist alone is the
neutron
atom
proton
electron
12
To determine the molar mass of an element, one must know the element's
atomic number
number of isotopes
Avogadro's constant
average atomic mass
13
According to the conservation of mass law, the mass of product _______ the mass of reactants
equal to
greater than
either greater than or less than
less than
14
According to the law of definite proportions, any two samples of NaCl have
the same ratio of elements
the same melting point
the same mass
slightly different molecular structures
15
The atomic theory proposed by Dalton has been
found to be plagiarized
accepted unchanged to the present day
expanded and modified
totally discarded
16
Neon-22 contains 12 neutrons. It also contains
22 protons
22 electrons
12 protons
10 protons
17
The atomic number of neon, 10, indicates there are 10
protons in the nucleus of the neon atom
neutrons outside the neon atom's nucleus
neon nuclides
energy levels in the neon atom's nucleus
18
A nuclear particle that has about the same mass as a proton is
nuclide
isotope
electron
neutron
19
All atoms of the same element have the same
atomic mass
number of neutrons
mass number
atomic number
20
Isotopes are atoms of the same element that have different
number of protons
numbers of electrons
chemical properties
masses
21
Molar mass
both yellow and green
the number of particles in exactly one gram of a substance
neither yellow or green
is the mass in grams of one mole of a substance
22
The most common form of hydrogen has
two neutrons
one neutron
no neutrons
three neutrons
