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Chapter 18 Review
Chapter 18 Review
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Review quiz for Chapter 18 Atoms and Elements #physicalscience
Flashcards
32 cards
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Questions
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Answers
1
Suppose an atom has a mass number of 23. Which state is true beyond any doubt?
the atom has an odd number of neutrons
the atom is not an isotope
the number of protons does not equal the number of neutrons
the atomic number is less than 11
2
A positively charged subatomic particle
atomic theory
proton
neutron
nuclues
3
The "building blocks" of matter are:
atoms and molecules
found only in the plasma state
as of yet discovered
electrons
4
Using you periodic table, how many electrons does Nitrogen (N) have?
15
8
7
14
5
Elements in the same column of the periodic table have similar chemical reactivity because:
they have the same number of valence shell electrons
atoms prefer to have completely full or empty valence shells
they have similar numbers of isotopes
they contain similar amounts of energy
6
Which of the following is unique for any given element?
the number of protons
the mass of a neutron
the number of neutrons
the charge of the electrons
7
The number of protons in one atom of an element is that element's
balanced charge
isotope
atomic number
mass number
8
In an atomic model that includes a nucleus, positive charge is
located in the space outside the nucleus
concentrated in the center of an atom
concentrated at multiple sites in an atom
spread evenly throughout an atom
9
The noble gases, such as helium and xenon, are non-reactive because:
they are unusually large atoms
they are chemically unstable
they have completely filled outer electron shells
they have been around longest on the earth
10
Proposed that the electrons travel in very specific energy levels or orbitals.
Ernest Rutherford
Democritus
James Chadwick
Neils Bohr
11
Discovered the neutron, using the work of Irene and Fredrick Joliot-Curie.
James Chadwick
J.J. Thomson
Democritus
Ernest Rutherford
12
A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____.
26
56
30
52
13
Atoms of the same element with different numbers of neutrons are called __________.
isotopes
metalliods
radioactive elements
metals
14
To find the number of neutrons in an atom, you would subtract
mass number from atomic number
atomic number from mass number
isotope number from atomic number
atomic number from electron number
15
A chemical symbol represents the ___________ of an element.
reaction
structure
name
group
16
Horizontal rows of the periodic table are called __________.
families
clusters
groups
periods
17
Which statement about subatomic particles is NOT true?
protons and neutrons have almost the same mass.
protons and neutrons have the same charge.
protons and electrons have opposite charges.
unlike protons and electrons, neutrons have no charge.
18
A subatomic particle in an atom that has a negative charge
atomic theory
proton
electron
neutron
19
Each inner energy level of an atom has a maximum number of ________ it can hold.
electrons
neutrons
protons
quarks
20
Which subatomic particles has a negative charge?
alpha particle
proton
electron
neutron
21
What scientist used a gold foil experiment to find that an atom is made of a nucleus.
John Dalton
Ernest Rutherford
Neils Bohr
Democritus
22
Which statement is true about oxygen-17 and oxygen-18?
they have the same mass number
They do not have the same number of protons
they are isotopes of oxygen
their atoms have an identical mass
23
The center core of an atom that contains protons and neutrons
nucleus
proton
atomic theory
electron
24
Elements that are gases, are brittle, and are poor conductors at room temperature are ________.
metals
nonmetals
isotopes
metalloids
25
Using your periodic table, how many energy levels are in a krypton atom?
4
3
5
6
26
Stated that all matter can be divided into small indivisible particles called atoms.
James Chadwick
J.J. Thomson
Ernest Rutherford
Democritus
27
An uncharged particle found in the nucleus of an atom
electron
neutron
atomic theory
nucleus
28
What does the electron cloud model describe?
the precise locations of electrons in atoms
the number of electrons in an atom
the most likely locations of electrons in atoms
the mass of the electrons in an atom
29
Who provided evidence for the existence of a nucleus in an atom?
Ernest Rutherford
J.J. Thomson
John Dalton
Democritus
30
A particle that moves around the nucleus is a(n) __________.
proton
quark
neutron
electron
31
I am in period 2 and my mass number is 11. I have only 6 neutrons. What element am I?
Lithium (Li)
Boron (B)
Calcium (Ca)
Carbon (C)
32
States that all matter is composed of tiny particles called atoms.
electron
atomic theory
proton
nucleus
