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WorksheetsChemistry Semester 1 Review 2019
Total questions: 54
Worksheet time: 28mins
A majority of the elements are the periodic table are____
metalloids
nonmetals
metals
gases
Which element in the third period has 4 valence electrons?
aluminum
scandium
silicon
carbon
Elements in the same group or family have the same number of______
neutrons
protons
valence electrons
energy levels
The periodic table is arranged in order of increasing ______
atomic mass
atomic numbers
electron number
isotope number
When looking at a group on the periodic table, how does atomic radius change from bottom to top?
tends to decrease
tends to increase
stays the same
increases then decreases
Which of the following elements tends to lose electrons?
calcium
carbon
fluorine
neon
How many valence electrons does sulfur have?
2
16
32
6
Which element has the smallest radius?
K
Na
O
Ne
Water freezing at 0 degrees Celsius is an _____ property.
chemical
extensive
physical
normal
Which element in the third period has the largest atomic radius?
sodium
magnesium
chlorine
argon
A characteristic of nonmetals is that they_____
lose electrons when forming ions
all make ions with a -1 charge
gain electrons when forming ions
form ions with positive charges
Which scientist is credited with developing the periodic table?
Rutherford
Dalton
Bohr
Mendeleev
From top to bottom, the Alkali metals' reactivity tends to ____
stay the same
increase
decrease
change randomly
The metalloid in the third period with 4 valence electrons is___
silicon
aluminium
scandium
boron
Which of the following indicates that a chemical change has occurred?
steam forms as water boils
a yellow solid forms when solutions are mixed
a substance dissolves in water
a substance is crushed
How much of an isotope remains after 2 half-lives?
50%
25%
12.5%
6.25%
Identify the correct formula for lithium hydroxide.
LiOH
LiH
Li2O
Li(OH)2
Give the correct name for Ti(SO3)2
titanium sulfite
titanium (II) sulfite
titanium (IV) sulfite
titanium (IV) sulfate
The correct name for NF3 is_____
nitrogen fluoride
nitride trifluoride
nitrogen trifluoride
trinitrogen monofluoride
What is the formula for copper (II) nitrite?
CuNO2
Cu2NO2
Cu(NO2)2
Cu(NO3)2
What is the formula for disulfur heptachloride?
S2Cl7
S7Cl2
S2Cl6
S3Cl7
Which element is present in all organic compounds?
hydrogen
carbon
nitrogen
oxygen
If a catalyst is used in a reaction, it is written ______ in the chemical equation.
as a reactant
as a product
above the arrow
not at all
Which of the following is false in regards to subatomic particles?
electrons are negatively charged and are the lightest subatomic particle
protons are positively charged and have a mass of 1 amu
neutrons have no charge and are the same mass as a proton
the mass of an electron and the mass of a proton are equal
Which is true regarding the nucleus of an atom?
it is the central core and composed of protons and electrons
it is the central core and composed of protons and neutrons
it has a positive charge and is composed of neutrons and electrons
it has a positive charge and has a low density
The smallest particle if an element that retains the properties of an element is called _____
atom
proton
electron
neutron
Which of the following equals one atomic mass unit (AMU)?
the mass of an electron
the mass of a helium-4 atom
the mass of a carbon-12 atom
1/12th the mass of a carbon-12 atom
There are two naturally occurring isotopes of boron, Boron-10 and Boron-11. Which is more abundant?
Boron-10
Boron-11
they are present equally
not enough info is provided
Which statement about ions is false?
cations form when atoms lose electrons
anions form when atoms lose electrons
anions form from when atoms gain electrons
cations have a positive charge
Emission of light from an atom occurs when ____
electrons jump to higher energy levels
electrons fall to lower energy levels
electrons are transferred
electrons move into the nucleus
What is the relationship between frequency and wavelength?
they are inversely related
they are directly related
frequency is wavelength divided by speed of light
wavelength equals frequency divided by speed of light
Of the pairs listed below, which would have the most nonpolar bonds?
sodium to chlorine
chlorine to chlorine
chlorine to hydrogen
chlorine to oxygen
Which type of bond results from the sharing of electrons?
metallic
ionic
covalent
James
Which of the following would contain ionic bonds?
TiF3
O2
PCl3
N2O5
The electrons involved in chemical bonds ____
are always lost and gained
are always shared
are valence electrons
are always the ones closest to the nucleus
How do metals obey the octet rule when bonding?
they gain electrons
they lose electrons
they share electrons
they do not obey the octet rule
This equation represents what type of reaction?
redox
hydrolysis
reduction
oxidation
In which of the following types of reactions are electrons gained?
decomposition
oxidations
nuetralization
reduction
What would you feel if you were to touch a flask in which an endothermic reaction was taking place?
the flask would be hotter than when the reaction started
the flask would be the same temperature as when the reaction started
it would probably shatter
the flask would be colder that when the reaction started
When heat is released by a chemical reaction, the heat is ____
absorbed by the surroundings
absorbed by the universe
released by the surroundings
released by the universe
What is the coefficient for chlorine in the following reaction: phosphorous trichloride makes phosphorous and chlorine.
3 Cl
Cl3
3Cl2
Cl2
How are new elements generated in a star?
nuclear fission generates heavy elements from lighter elements
nuclear fusion generates heavy elements from lighter elements
alpha particle emissions transform light elements into heavy elements
beta particle emissions transform light elements into heavy elements
Which property determines the life cycle of a star?
the materials of the star is made of
the mass of the star
the temperature of the star
the star's luminosity
How does the Big Bang Theory suggest the universe was created?
a giant explosion of a star
a giant collision of two galaxies
a small hot point that kept expanding
a large space collapsed
A mysterious substance has a shiny appearance, is malleable, is conductive, and reacts with HCl. It is probably a ___
nonmetal
metalloid
metal
alien material
Two clear, colorless solutions are mixed in a test tube, an insoluble compound forms in the test tube and settles on the bottom. What would you see in the test tube?
two clear, colorless liquids
two white solids
a white solid and a clear liquid
a white liquid
In a double displacement reaction, aqueous cobalt (III) chloride reacts with aqueous lithium hydroxide. The products are?
LiCl and Co(OH)3
ClOH and CoLi3
LiCl3 and CoOH
no reaction
Calculate the energy required to heat 30g of material from 20 C to 80 C. The specific heat of the material is 0.987 J/g X C.
1776.6 J
1776.6 g
1776.6 C
1776.6 J/g X C
Given the following reaction, increasing the pressure would shift the reaction towards the ___.
2H2(g) + O2(g) --> 2H2O(g) + 286kJ
products
reactants
no change would occur
add catalyst
Given the following reaction, increasing the temperature would shift the reaction towards the ___.
2H2(g) + O2(g) --> 2H2O(g) + 286kJ
products
reactants
no change would occur
add catalyst
Which of the following would most likely be precipitate in a double displacement reaction?
NaBr
KOH
FeS
(NH4)2CO3
Temperature is a measure of the amount of ____ in a material.
kinetic energy
heat
cold energy
potential energy
The graph above represents a ___ reaction.
exothermic
isothermic
endothermic
nonideal
Tin is capable of replacing all of the following elements in a single replacement reaction EXCEPT____
copper
silver
magnesium
lead
