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WorksheetsChemistry Semester 1 Review 2019
Total questions: 60
Worksheet time: 47mins
Which piece of equipment is used for finding volume of liquid.
beaker
flask
graduated cylinder
balance
Which piece of equipment is used for finding mass.
beaker
flask
graduated cylinder
balance
What is 5.75 x 103 + 4.25 x 102
10 x 105
6.175 x 103
6.175 x 102
10 x 103
What is (4.0 x 105) x (1.5 x 10-2)
5.5 x 103
6.0 x 103
2.5 x 10-7
4.15 x 105
A measure of the quantity of matter is
density.
weight.
volume.
mass.
A measure of how much space matter takes up is
density
weight
volume
mass
Which of the following is not a physical change?
grinding
cutting
boiling
burning
Which of the following is not a chemical change?
rusting
igniting
melting
burning
A state of matter in which a material has no definite shape and no definite volume is the ____ state.
gas
liquid
plasma
solid
The liquid state of matter can be described as
having definite shape and definite volume.
having neither a definite shape nor a definite volume.
having lost electrons owing to energy content.
having a definite volume but not a definite shape.
A solid substance is
always frozen regardless of its container.
always a crystal regardless of its container.
always the same shape regardless of its container.
always losing particles regardless of its container.
A three-dimensional region around a nucleus where an electron may be found is called a(n)
spectral line.
electron path.
orbital.
the path
The major difference between a 1s orbital and a 2s orbital is that
the 2s orbital can hold more electrons.
the 2s orbital has a slightly different shape.
the 2s orbital is at a higher energy level.
the 1s orbital can have only one electron.
The letter designations for the first four sublevels with the maximum number of electrons that can be accommodated in each sublevel are
s:2, p:4, d:6, and f:8.
s:1, p:3, d:5, and f:7.
s:2, p:6, d:10, and f:14.
s:1, p:2, d:3, and f:4.
The element with electron configuration 1s2 2s2 2p6 3s2 3p2 is
Mg (Z = 12).
C (Z = 6).
S (Z = 16).
Si (Z = 14).
The electron configuration for the carbon atom (C) is 1s2 2s2 2p2. The atomic number of carbon is
3.
6.
11.
12.
What is the electron configuration for nitrogen?
1s2 2s2 2p3
1s2 2s3 2p2
1s2 2s3 2p1
1s2 2s2 2p2 3s1
The electron notation for aluminum is
1s2 2s2 2p3 3s2 3p3 3d1
1s2 2s2 2p6 3s2 2d1
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p9
If an element has an octet of electrons in its highest main energy level, there are ____ electrons in this level.
2
8
10
32
The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to
Mendeleev.
Moseley.
Bohr.
Ramsay.
Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing
atomic number.
density.
reactivity.
atomic mass.
Moseley's work led to the realization that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing
atomic mass.
density.
radioactivity.
atomic number.
A vertical column of blocks in the periodic table is called a(n)
group.
period.
course.
octet.
A horizontal row of blocks in the periodic table is called a(n)
group.
period.
family.
octet.
Elements in a group or column in the periodic table can be expected to have similar
atomic masses.
atomic numbers.
numbers of neutrons.
properties.
Bromine, atomic number 35, belongs to Group 17. How many electrons does bromine have in its outermost energy level?
7
17
18
35
The energy required to remove an electron from an atom is the atom's
electron affinity.
electron energy.
electronegativity.
ionization energy.
A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is called
electron affinity.
electron configuration.
electronegativity.
ionization potential.
When an electron is acquired by a neutral atom, the energy change is called
electron affinity.
electronegativity.
ionization energy.
electron configuration.
A positive ion is known as a(n)
ionic radius.
valence electron.
cation.
anion
A negative ion is known as a(n)
ionic radius.
valence electron.
cation.
anion.
The ionization energies for removing successive electrons from sodium are 496 kJ/mol, 4562 kJ/mol, 6912 kJ/mol, and 9544 kJ/mol. The great jump in ionization energy after the first electron is removed indicates that
sodium has four or five electrons.
the atomic radius has increased.
a d electron has been removed.
the noble gas configuration has been reached.
For each successive electron removed from an atom, the ionization energy
increases.
decreases.
remains the same.
shows no pattern.
The electrons available to be lost, gained, or shared when atoms form compounds are called
ions.
valence electrons.
d electrons.
electron clouds.
The number of valence electrons in Group 1 elements is
1.
2.
8.
equal to the period number.
The number of valence electrons in Group 17 elements is
7.
8.
17.
equal to the period number.
Across a period from left to right, ionization energies generally
increase.
decrease.
remain constant.
drop to zero.
Down a group from top to bottom, ionization energies generally
increase.
decrease.
remain constant.
drop to zero.
The principles of atomic theory recognized today were conceived by
Avogadro.
Bohr.
Dalton.
Rutherford.
According to Dalton's atomic theory, atoms
are destroyed in chemical reactions.
can be divided.
of each element are identical in size, mass, and other properties.
of different elements cannot combine.
Because any element used in the cathode produced electrons, scientists concluded that
all atoms contained electrons.
only metals contained electrons.
atoms were indivisible.
atoms carried a negative charge.
The deflection of cathode rays in Thomson's experiments was evidence of the ____ nature of electrons.
wave
charged
particle
spinning
Whose series of experiments identified the nucleus of the atom?
Rutherford
Dalton
Chadwick
Bohr
A positively charged particle with mass found inside an atom
proton.
neutron.
electron.
positron.
A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n)
nuclide.
neutron.
electron.
isotope.
An atom is electrically neutral because
neutrons balance the protons and electrons.
nuclear forces stabilize the charges.
the numbers of protons and electrons are equal.
the numbers of protons and neutrons are equal.
Isotopes are atoms of the same element that have different
principal chemical properties.
masses.
numbers of protons.
numbers of electrons.
What particle in an atom has a negative charge and a very small mass
electrons
protons
neutrons
gravitons
Millikan’s oil drop experiment allowed him to determine what?
Charge of an electron
Mass of a neutron
Mass of a proton
Charge of the proton
According to Bohr, electrons cannot reside at ____ in the figure above.
A
B
C
D
The Atomic Number is based on:
Number of ions
Number of protons
Number of atoms
Number of Neutrons
Average Atomic mass comes from:
The weighted average mass of all the isotopes of an element
Mass of a single atom of an element
Mass of 5 atoms divided by 5
Number of Protons and Neutrons added together
All atoms of the same element have the same
atomic mass
the number of neutrons
mass number
atomic number
Avogadro’s number is the number of atoms in a _____________.
element
compound
mole
kilogram
What is the mass of one mole of Chlorine atoms (Cl) in grams?
35.47
35
187
35.453
The mass of a sample containing 3.5 mol of silicon atoms is
98.3 g
95 g
28.0855 g
84.165 g
What is the molar mass of NaOH?
19.9985545 g
22.989769 g
15.9994 g
39.997109 g
1.5 moles of carbon atoms is how many atoms?
6.022 x 1023
6.022 x 1523
8.044 x 1023
9.033 x 1023
5.55 x1025 atoms of gold (Au) is how many grams of gold?
555 g
18,153 g
92 g
196.97 g
Molar mass
is the mass in grams of one mole of a substance.
is numerically equal to the average atomic mass of the element.
Both (a) and (b)
Neither (a) nor (b)
