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Atomic History
K is the symbol for which element?
Which philosopher said that matter was indivisible?
Atomic History
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1
Which philosopher said that matter was indivisible?
Plato
Democritus
Aristotle
Dalton
2
K is the symbol for which element?
Copper
Sodium
Krypton
Potassium
3
What is the symbol for oxygen?
Ox
Og
O
D
4
Which equality depends on the element?
Avogadro's number
Molar mass
5
Who is responsible for the cherry model of the atom?
Avogadro
Thomson
Dalton
Rutherford
6
6.02 x 10
23
is equal to _____ number of particles.
Avogadro's
Dalton's
Boyle's
Milikan's
7
If an atom has an atomic number of 19 and 20 neutrons, what is it's atomic mass?
19
cannot be determined
20
39
8
Where are electrons found in the atom?
around the nucleus
inside the nucleus
an atom doesn't contain electrons
9
The larger of two numbers (often a decimal) tells us the atomic ____ of the element.
number
mass
10
When matter is neutral, which two particles are equal?
electrons and neutrons
protons and neutrons
protons and electrons
11
Al-27 has an atomic number of 13, how many electrons does it contain?
13
cannot be determined
14
27
12
What equality is used to go from atoms to moles?
Avogadro's number
Molar mass
cannot be determined
Depends on the element
13
If atoms are isotopes of the same element, what is the same?
number of neutrons
mass number
number of protons
14
The mass in grams of one mole of a substance.
molar mass
atomic number
atomic mass
15
Ne is the symbol for which element?
Nitrogen
Einsteinium
Nickel
Neon
16
Who is given credit for discovering the electron?
Rutherford
Boyle
Dalton
Thomson
17
What has to be the same for two atoms if they are isotopes of the same element?
number of neutrons
atomic number
mass number
number of electrons
18
What is the symbol for sodium?
Na
Sd
So
NA
19
What model represents Thomson's work?
solar system
Chocolate chip cookie
Billiard ball
cherry
20
Which conversion factor is the same regardless of the element?
Avogadro's number
Molar mass
21
Who is given credit for discovering the nucleus?
Rutherford
Dalton
Thomson
Boyl
22
What is the mass of one carbon atom?
12.01 amu
12.01 lb
cannot be determined
12.01 g
23
Na-23 has an atomic number of 11, how many neutrons does it contain?
23
cannot be determined
12
11
24
Where are the protons found in an atom?
in the nucleus
an atom doesn't contain protons
around the nucleus
25
What is different for isotopes of the same element?
Number of protons and therefore mass number
Number of electrons and therefore mass number.
Number of neutrons and therefore mass number.
26
What is the mass of one mole of hydrogen atoms?
1.01 amu
1.01 g
6.02 x 1023 mol
27
Dalton's model of the atom is said to be like a ______.
chocolate chip cookie
billiard ball
cotton ball
cherry
28
Mass number is equal to the sum of the number of _____ plus the number of _____.
protons, neutrons
electrons, neutrons
protons, electrons
29
Elements are identified by their atomic number which is equal to the number of _____.
neutrons
electrons
protons
30
True or False: The discovery of isotopes made one of the points of Dalton's Atomic theory false.
false
true
31
What equality is used to go from mass to moles?
depends on the element
cannot be determined
Molar mass
Avogadro's number
