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WorksheetsReview for Midterm 2019 - Atomic Theory & the Periodic Table
Total questions: 25
Worksheet time: 19mins
What is the volume of the object in the graduated cylinder?
86 mL
86.0 mL
6.0 mL
6 mL
Two atoms are examined. Their nuclei have exactly the same number of protons, but one nucleus has one more neutron than than the other. These atoms represent
the same element, but different ions.
the same element, but different isotopes.
different elements, but the same ion.
different elements, but the same isotopes.
How many protons are in an atom represented by 2713 Al?
40
27
14
13
How many neutrons are contained in an atom represented by C-14?
4
6
8
14
How many protons are contained in the nucleus of the atom showing the diagram?
2
7
5
15
What is the mass number for the atom shown in the diagram above?
2
15
5
7
Horizontal rows of the Periodic Table are called
clusters.
families.
groups.
periods.
Vertical columns of the Periodic Table are called
clusters.
families.
groups.
periods.
Which of the following elements would have chemical properties similar to sulfur?
phosphorus
chlorine
oxygen
argon
How many electrons does a phosphorus atom have in its outer energy level? Its electron configuration is 1s22s22p63s23p3.
2
3
5
15
Which of the following is a nonmetal?
silicon
aluminum
hydrogen
uranium
Which of the following is a metalloid?
Si
Al
H
U
Which of the following is a metal?
silicon
hydrogen
helium
nobelium
Atom X has 2 protons, 2 neutrons, and 2 electrons.
Atom Y has 11 protons, 10 neutrons, and 11 electrons.
Atom Z has 26 protons, 30 neutrons, and 26 electrons.
Which atom is the most reactive?
atom X
atom Y
atom Z
None of the atoms are reactive.
Which of the following is the most reactive metal?
lithium
copper
caesium
aluminum
All atoms of an element have the same
number of neutrons.
atomic mass.
atomic number.
mass number.
Compared to the entire atom, the nucleus of the atom is
tiny, contains most of the atom's mass, and is positively charged.
tiny, contains none of the atom's mass, and is positively charged.
tiny, contains most of the atom's mass, and is neutrally charged.
tiny, contains none of the atom's mass, and is negatively charged.
What subatomic particle was discovered in the cathode ray tube experiment?
proton
electron
neutron
nucleus
What is the nuclear charge in an atom of boron?
+11
+6
+5
-5
What is the total number of electrons in an Mg+2 ion?
10
24
2
12
What is the electron configuration for an Mg+2 ion?
1s22s22p63s2
1s22s22p63s0
1s22s22p63s23p64s23d4
1s22s22p63s23p63d6
Dalton incorporated the Law of Conservation of Mass into his atomic theory by asserting that
matter is composed of atoms.
atoms can be destroyed in chemical reactions.
atoms are indivisible.
According to the law of definite proportions, any two samples of potassium chloride (KCl) have
slightly different molecular structures.
the same melting point.
the same ratio of elements by mass.
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 number of protons and electrons.
there are protons in the nucleus.
A three-dimensional region around a nucleus where an electron may be found is called a(n)
orbital.
electron path.
spectral line.
