Font size
WorksheetsQuiz #14 - Changes and Properties
Total questions: 169
Worksheet time: 14hrs 42mins
Density (mass per unit volume): Chemical or Physical Property
Brittleness (how easily is breaks): Chemical or Physical Property
Luster (how shiny): Chemical or Physical Property
Is this an example of a physical or chemical change?
physical
chemical
Is this an example of a physical or chemical change?
physical
chemical
Which box has a higher density?
A
B
They are the same
The ability to burn is known as---
Flammability
Combustion
Density
Exploding
Mass divided by volume is the formula for calculating----
Mass
Volume
Density
Matter
Reactivity (bubbling, fizzing) is a --- property.
Chemical
Physical
______________________ can only be recognized when substances react or do not react chemically with one another.
Physical properties
Chemical properties
Flammable properties
Colorful properties
Density (mass per unit volume): Chemical or Physical Property
Solubility (ability to dissolve): Chemical or Physical Property
Brittleness (how easily is breaks): Chemical or Physical Property
Luster (how shiny): Chemical or Physical Property
A physical property can be observed __________ a chemical reaction
during
without
A chemical property can be observed __________ a chemical reaction
during
without
Combustion or exploding, is a --- property.
Chemical
Physical
Malleability, the ability to be flattened into thin sheets, is a ---property.
Physical
Chemical
What key words, when present in a question about chemical reactions, might indicate a chemical change is occuring? Check all that apply.
Bubbling
Fizzing
Dissolving
Evaporating
Burning wood
physical change
chemical change
Is this an example of a physical or chemical change?
physical
chemical
Is this an example of a physical or chemical change?
physical
chemical
Is this an example of a physical or chemical change?
physical
chemical
Is this an example of a physical or chemical change?
physical
chemical
How shiny something is is called?
Luster
Malleiablity
Ductility
Conductivity
Whether something conducts electricity or heat is called
Luster
Malleiablity
Ductility
Conductivity
Being able to shape something into new shapes
Luster
Malleiablity
Ductility
Conductivity
Decay or Decomposition: Physical or Chemical Property
Chemical Property
Physical Property
mixing baking soda and vinegar
physical change
chemical change
Freezing Juice?
physical Change
chemical Change
Baking Cookies
Physical Change
Chemical Change
Lighting a Match
Physical Change
Chemical Change
Cooking Pancakes
Physical Change
Chemical Change
Crumpling Paper
Physical Change
Chemical Change
How many atoms of oxygen are in this molecule?
How many elements are in this substance: CaCO3
2
3
4
5
How many atoms of each element are in NaCl?
Na=1, Cl=1
Na=2. Cl=2
Na=1, Cl-2
How many atoms are there TOTAL in H2SO4 ?
6
5
7
3
The ______ are numbers found on the lower right-hand side of an element symbol.
Coefficient
Exponent
Multiplier
Subscript
H2SO4
H = 2, S = 4, O = 4
H = 2, S = 1, O = 4
H = 8, S = 4, O = 4
H = 2, SO = 4
The smallest particle of an element; made of electrons, protons, and neutrons
Atoms
Elements
Molecules
Products
The process by which one or more substances change to produce one or more different substances
Chemical Process
Reactant
Chemical Reaction
A substance produced during a chemical reaction
Product
Reactant
Properties
Physical and chemical characteristics of matter used to describe or identify a substance
Chemical Reaction
Properties
Product
A substance that takes part in and undergoes change during a reaction
Product
Molecule
Reactant
A new substance with unique chemical and physical properties that is formed when two or more elements are chemically bonded during a chemical reaction
Product
Compound
Molecule
Atom
A chemical reaction or process that absorbs heat from the surroundings
Endothermic
Exothermic
A chemical reaction or process that releases heat.
Endothermic
Exothermic
What charge do protons have?
positive
negative
neutral
What charge do electrons have?
positive
negative
neutral
What charge do neutrons have?
positive
negative
neutral
Which subatomic particles are found in the nucleus?
protons
neutrons
electrons
protons and electrons
protons and neutrons
How many protons does an atom of Nitrogen have?
7
14
21
How many electrons does a neutral atom of Nitrogen have?
7
14
21
How many neutrons does an atom of Nitrogen have?
7
14
21
The atomic number is always the number of
protons
neutrons
electrons
To find the number of neutrons....
add the number of electrons and number of protons
subtract the atomic number from the atomic mass
subtract the number of protons from the number of electrons
Which image correctly shows the relative sizes of the subatomic particles?
All matter is made of _________.
Atoms are made up of ________________
energy
electrons
subatomic particles
gasses
The subatomic particles that make up an atom.
solid, liquid, gas
electrons, protons, nucleus
energy, protons, nucleus
electrons, protons, neutrons
__________ are negatively charged particles that are in the orbitals around the nucleus.
protons
nucleus
neutrons
electrons
A proton has a ___________ charge.
positive
negative
neutral
massive.
An electron has a _________ charge
positive
neutral
negative
massive
A neutron has _________ charge or is ________.
negative ... neutral
positive .... neutral
no .... negative
no ... neutral
The smallest part of any element. Made up of protons, neutrons and electrons.
Atom
AMU
Ion
Isotope
The negatively charged particles in an atom
Proton
Electron
Neutron
Electron Cloud
Which TWO of the following subatomic particles are inside the nucleus?
protons
electrons
neutrons
There are no subatomic particles in the nucleus of an atom.
How many atoms of Hydrogen are in H2O
1
2
3
more than 3
How many atoms of Hydrogen are in this compound?
1
2
3
4
All matter is made of _________.
The subatomic particles that make up an atom.
solid, liquid, gas
electrons, protons, nucleus
energy, protons, nucleus
electrons, protons, neutrons
What is the chemical symbol for Hydrogen
H
He
Hy
Hg
What is this subatomic particle that has positive charge?
Electron
Neutron
Proton
Megatron
What is a substance made of two or more elements that are chemically combined called?
A. element
B. compound
C. mixture
D. solution
Is salt (NaCI) a compound or an element?
Compound
element
What is the definition of a compound?
The smallest part of any substance which can exist on its own
Two or more atoms chemically joined together (can be the same or can be different)
A simple substance in which all the atoms are identical
Two or more different elements chemically joined together
A substance that cannot be broken down into any other substance by ordinary chemical means is called
a molecule.
a mixture.
an element.
a compound.
Two or more physically combined substances form
a compound.
an acid.
an element.
a mixture.
What is an example of a mixture?
Table salt
Water
Oxygen
Air
A substance that contains only one type of atom is a(n)
compound
element
heterogeneous mixture
homogeneous mixture
A compound is made of ________ atoms.
big
similar
different
The smallest unit of an element is
a compound.
a molecule.
an atom.
a mixture.
The smallest unit of a compound is
an element.
a molecule.
an atom.
a mixture.
True or False: All molecules are compounds.
true
false
True or false: Air is a mixture.
true
false
Which of the following is a mixture?
oxygen
gold
sand
water
Matter is anything that has mass and takes up space.
true
false
