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Chemistry Chapter 4 Review Flashcards | StudBud
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Chemistry Chapter 4 Review
Chemistry Chapter 4 Review
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1
Which of these statements is FALSE?
electrons have a negative charge
the neutron is found in the nucleus of the atom
the nucleus of an atom is positively charged
electrons have a mass of 1 amu
2
Dalton theorized that atoms are indivisible. Scientists now know that:
atoms of an element can have different numbers of protons
atoms are divisible
Dalton's theories are completely correct
all atoms of an element are not identical but they have the same mass
3
What is the atomic number and the mass number of an atom with 11 protons and 12 neutrons
atomic number = 12, mass number = 11
atomic number = 23, mass number = 11
atomic number = 11, mass number = 12
atomic number = 11, mass number = 23
4
Most of the volume of the atom is occupied by the
neutrons
protons
protons and neutrons
electrons
5
Which of the following statements is correct?
electrons are positively charged
atoms are positively charged
neutrons have no charge
protons are negatively charged
6
Isotopes of the same element have:
the same number of protons and neutrons
the same number of neutrons, but different number of protons
the same number of protons, but different number of electrons
the same number of protons, but a different number of neutrons
7
If the atomic mass of an element Z is 21.5 amu, what is the relative abundance of isotopes Z-20 and Z-22
one Z-20 to two Z-22s
two Z-20s to one Z-22
one Z-20 to one Z-22
one Z-20 to three Z-22s
8
The number of neutrons in the nucleus of an atom can be calculated by:
subtracting the protons from electrons
subtracting the protons from the mass number
adding together the electrons and protons
adding the mass number to the protons
9
Which of the following statements is correct?
Group 1A contains hydrogen and helium
Elements on the periodic table are listed by increasing atomic mass
Each vertical column on the periodic table is a period
Lanthanoids and Actinoids do not belong in a period
10
An atom of hydrogen-2 (also known as deuterium) contains:
1 proton, 1 electron, and 1 neutron
2 protons, 2 electrons, and 4 neutrons
1 proton, 1 electron, and 2 neutrons
2 protons, 2 electrons, and 2 neutrons
11
Which of these statements is included in Dalton's atomic theory?
atoms are divisible
chemical reactions occur when atoms are separated, joined, or rearranged
atoms of the same element can have different numbers of protons
some but not all elements are composed of atoms
12
The relative abundance of each isotope of an element determines its:
atomic number
atomic mass
number of protons
number of electrons
13
Which of the following statements is NOT consistent with the results obtained in Rutherford's experiment?
electrons are contained in the nucleus of the atom
atoms are composed mainly of empty space
the nucleus of an atom contains most of the mass
the nucleus of an atom is positively charged
14
Which of the following correctly lists particles in order from least massive to most massive?
proton, electron, hydrogen atom, helium atom
proton, helium atom, hydrogen atom, electron
electron, proton, helium atom, hydrogen atom
electron, proton, hydrogen atom, helium atom
15
Three isotopes of oxygen are: oxygen-16, oxygen-17, and oxygen-18. Which isotope is most abundant if average is 15.9994?
oxygen-16
all are equally abundant
oxygen-17
oxygen-18
16
The nucleus of an atom is:
positively charged and has a high density
negatively charged and has a low density
negatively charged and has a high density
positively charged and has a low density
17
All atoms of the same element have the same:
mass number
number of neutrons
number of protons
mass
