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Atomic Structure and History
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
An atom has 2 protons and 3 neutrons. What is the atomic mass?
4
5
2
3
2
What is the smallest particle into which an element can be divided?
atom
compound
cell
molecule
3
The current model states that electrons move in orbits like planets in rings around the sun. T or F?
True
False
4
Which of the following is part of Dalton's theory?
all matter is living
all matter is nonliving
all matter is made of molecules
all matter is made of atoms
5
An atom has 11 protons and 11 neutrons. What is the atomic number?
22
11
10
4
6
What did JJ Thompson discover?
nucleus
protons
electron
electron cloud
7
What is the atomic number if the number of electrons in a neutral atom is 8?
16
5
12
8
8
How do atoms make up all substances?
they don't
they join as cells
they explode
they combine in different ways
9
What is the uncharged particle of an atom (the one with no charge)?
neutron
proton
nucleus
electron
10
What do we call the mass of the protons and neutrons together?
atomic number
charge
mass number
density
11
How many neutrons are in an atom of S (check S box of periodic table)? :)
16
0
8
32
12
Who experimented with gold foil and discovered the protons?
Bohr
Schrodinger
Democritus
Rutherford
13
Which of the following is true of atomic structure?
electrons are the largest particles
protons and neutrons are in the nucleus
protons are negatively charged particles
electrons are in the nucleus
14
What is the atomic number of an atom?
the number of protons
the number of neutrons
the number of atoms in an element
one
15
How is Bohr's model of the atom different from today's model?
the electrrons move in circular paths
electrons mix with protons
electrons are neutral
electrons move in shaped orbitals
