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181 questions
Electron sharing occurs in ionic bonding.
Gas under pressure
Corrosive material
Sublimation is a chemical change.
Evaporation is a change of state from
solid to liquid
gas to liquid
liquid into solid
liquid to gas
The opposite of sublimation is
deposition
condensation
evaporation
melting
What process describes a liquid changing to a solid?
What process describes a gas changing to a liquid?
This is a picture of what happens when dry ice is added to water. The dry ice changes immediately from a solid to a gas.
This is a ...
physical change
chemical change
breaking glass
chemical change
physical change
Is a rusting steel bicycle a chemical or physical change?
Is spoiling food a physical or chemical change?
physical
chemical
Physical Property
Chemical Property
Physical Property
Chemical Property
Explodes when exposed to heat.
Physical Property
Chemical Property
Physical Property
Chemical Property
Physical Property
Chemical Property
Sugar dissolves in water.
Physical Change
Chemical Change
Sugar burns and turns black.
Physical Change
Chemical Change
Gold (Au) has a shiny lustre.
Dynamite explodes.
Physical Change
Chemical Change
Copper is ductile.
Physical Property
Chemical Property
Physical Change
Chemical Change
The first person to use the word 'atomos' came from
Greece
Italy
Britain
Alchemists attempted to transform metals into _______.
gold
copper
nickel
steel
What was Dalton's Theory of Matter?
All matter is made up of atoms.
All matter is made up of 4 different elements.
Cl is the symbol for
What were Aristotle's four parts to his "4 element theory"?
Fire, ice, water, rock
Fire, Water, Air, Earth
Fire, Ocean, Air, Metal
Flame, Sky, Ocean, Earth
Who said that electrons are found in shells around the nucleus?
Dalton
Archimedes
Democritus
Bohr
To which category of elements does an element belong to if it is brittle and a poor conductor of electricity?
metalloids
nonmetals
metals
Which subatomic particle is gained or lost during ionic compound formation?
proton
electron
neutron
During electron transfer involving a metal and nonmetal during ionic compound formation, which of the following is correct?
Which of the following is the correct IUPAC name of the compound: BaO?
Which is the correct formula for the compound: manganese (III) fluoride?
Which pair of elements is most likely to form a molecular compound?
Mg with Cl
F with Cl
Li with S
Ni with Rn
The element with atomic number 15 has how many electrons?
Match the subatomic particle to its charge.
Electron | Positive | ||
Proton | Negative | ||
Neutron | Neutral |
In shells
Neils Bohr stated that electrons move in electron
trajectories
A vertical column in the periodic table with elements that share similar properties.
row
group
period
A compound
A molecule
Which group of the periodic table is composed of the least reactive elements?
alkali metals
alkaline earth metals
halogens
noble gases
Elements which are all shiny, conduct electricity and heat are called
metal
nonmetal
metalloid
Two elements chemically bonded together will form...
a colloid
a compound
a mixture
a solution
Calcium has properties most similar to which of the following elements?
Aristotle
Mendeleev
Chadwick
Bohr
Which property did Mendeleev use to arrange his periodic table?
Alphabet
Ion Charge
How many protons are in one atom of Boron (B) ?
How many electrons are in one atom of Bromine (Br) ?
Sodium
Aluminum
the atomic mass number
the group number
Where is most of the mass in an atom?
protons & electrons in the nucleus
electrons in the shells
protons & neutrons in the nucleus
protons & electrons in the shells
What would be the IUPAC chemical formula for combining Al3+ and Cl-
What is the correct formula for Zinc (II) Bromide?
ZnBr2
ZNBr
ZnBr
Z2Br
What is the formula for iron (III) chloride?
FeCl
FeCl3
FeClO3
Fe3Cl
Molecular compound bonds are between...
Metal and Non-metal
Non-metal and Non-metal
Metal and Metal
release of oxygen
rusting of metal
Group 1 Alkali metals
Group 2 Alkaline Earth metals
Where are the LEAST reactive elements located on the periodic table?
Group 1
Group 2
Group 17
Group 18
Which is one of the reactants of cellular respiration?
energy
glucose
carbon dioxide
water
oxygen + lactic acid
carbon dioxide + water
glucose + oxygen
water + glucose
Respiration
Magnesium oxide
Combustion
Corrosion
True or False: Formation of bubbles is usually evidence of a chemical reaction.
True
False
A chemical reaction in which a compound or element burns by reacting with oxygen is called ...
combination reaction
decomposition reaction
combustion reaction
corrosion reaction
A white opaque solid forming when two clear liquids are poured together
The substances listed on the left side of a chemical word equation are the
Products
Reactants
Conservation of mass is true ...
only for reactions that take place in open systems.
only for reactions that take place in closed systems.
for reactions in both open and closed systems.
for no reactions at all.
A solid that forms from 2 transparent solutions during a chemical reaction is called a
Physical Change
Chemical Change
Exothermic Change
Exothermic Change
Identify the reactant(s) and product(s) of the reaction.
hydrogen + oxygen are (a)
water is (b)
hydrogen + oxygen
water
In a reaction A + B ----> C, reactant A has 5g and product C has 9g.
How many grams does reactant B have?
4g
5g
9g
14g
a pure substance
a mixture
an element
a solution
hydrogen gas (H2)
sodium chloride (NaCl)
oxygen gas (O2)
The salad dressing in the picture is a
suspension
solution
pure substance
mechanical mixture
Decreases
Increases
Grinding a crystal solid into powder increases the rate of reaction due to increased
concentration
surface area
temperature
reactants
A solution is heated on a hot plate and bubbles form. Do you assume a chemical reaction took place?
Yes
No
Which factors increase the rate of a reaction?
increasing temperature
increasing concentration
increasing surface area
all of these
See the image for the question.
Which of the following increases the reaction rate?
less surface area
lower temperature
an inhibitor
increased concentration
What is an enzyme?
a catalyst
a microorganism
a product
a reactant
What does this pictogram warn you about?
gases under pressure
fire hazard
explosion or reactivity hazard
may cause less serious health effects
What does this pictogram warn you about?
gases under pressure
fire hazard
explosion or reactivity hazard
may cause less serious health effects
What does this pictogram warn you about?
gases under pressure
fire hazard
explosion or reactivity hazard
may cause less serious health effects
What does this pictogram warn you about?
may cause or suspected of causing serious health effects
oxidizing hazard
organisms or toxins that cause diseases
may cause death or toxicity with short exposure to small amounts
What does this pictogram warn you about?
may cause or suspected of causing serious health effects
oxidizing hazard
organisms or toxins that cause diseases
may cause death or toxicity with short exposure to small amounts
What does this pictogram warn you about?
may cause or suspected of causing serious health effects
oxidizing hazard
organisms or toxins that cause diseases
may cause death or toxicity with short exposure to small amounts
What does this pictogram warn you about?
may cause or suspected of causing serious health effects
oxidizing hazard
organisms or toxins that cause diseases
may cause death or toxicity with short exposure to small amounts
What does this pictogram warn you about?
may cause or suspected of causing serious health effects
may cause less serious health effects
corrosive damage to skin, eyes or metals
may cause death or toxicity with short exposure to small amounts
Protons and neutrons have have approximately the same mass.
true
false
Electrons have almost no mass.
true
false
Mg 2+
has lost 2 protons
has lost 2 electrons
has gained 2 electrons
has gained 2 protons
S 2-
has lost 2 protons
has lost 2 electrons
has gained 2 electrons
has gained 2 protons
Which two elements have the most similar properties?
K & Li
K & Ca
Ca & Sc
Ca & Li
How many neutrons in a nickel atom?
28
29
57
What are the products in the following chemical equation?
CH4 and 2O2
CO2 and 2H2O
What state of matter is represented in the picture above?
solid
liquid
gas
The ability to hammered into a thin sheet or be bent is
Ductility
Solubility
Density
Malleability
Which chemical formula could this molecule represent?
H2O3
H3O2
H2O4
H2O2
A reaction that releases heat to the surroundings is
exothermic
endothermic
When a chemical reaction happens and the temperature decreases, then it is an
Endothermic reaction
Exothermic reaction
A reaction happening in an uncovered beaker is a(n)...
open system
closed system
isolated system
individual system
Label the parts of the atom.
electron
proton
neutron
nucleus
Identify the product(s) in this word equation
Sodium
Sodium chloride
Sodium and Chlorine
Sodium and sodium chloride
Magnesium reacts with oxygen to form magnesium oxide. The correct word equation is...
A
B
C
D
Iron (a grey metal) reacts with sulfur (a brittle yellow solid) to produce iron sulfide (a black solid).
In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?
4 grams
6 grams
8 grams
10 grams
Match the following
CO2 | Reactant Element | ||
CH4 | Reactant Compound | ||
O2 | Product Compound |
Does the image correctly represent the Law of Conservation of Mass?
yes
no
6 g
10 g
4 g
Mg + 2HCl ---> MgCl2 + H2
Which reactant is a compound?
HCl
What is the IUPAC name of this compound?
dipotassium phosphide
potassium monophosphide
dipotassium monophosphide
potassium phosphide
What is the chemical name of this compound?
dinitrogen tetroxide
dinitrogen pentoxide
nitrogen oxide
nitrogen oxygen
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