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WorksheetsDecember Exam - Practice
Total questions: 35
Worksheet time: 18mins
How are particles in a block of iron affected when the block is melted?
The particles gain mass
The particles contain less energy
The particles move more rapidly
The particles decrease in volume
Which change in the state of water particles causes the particles to become arranged in a fixed position
boiling
melting
freezing
evaporating
Which statement best describes the motion of the molecules of a solid object?
they vibrate in place within a fixed volume
they move around freely within a fixed volume
they vibrate in place and take the shape of their container
they move around freely and take the shape of a container
Which of the following will absorb heat energy?
two sticks being rubbed together
a piece of wood burning
steel wool rusting
ice cubes melting
Which sequence has the states of matter listed from least to greatest kinetic energy?
solid-gas-liquid
gas-liquid-solid
liquid-solid-gas
solid-liquid-gas
Which statement supports that a chemical reaction took place
change in color occured
a new substance was formed
a physical change in the iron occured
the original substances were present after
When cold temperatures are produced in a chemical reaction, the reaction is known as
exothermic
endothermic
suspension
vaporization
Elements are made up of small particles called atoms. All atoms of an element are the same. If scientist study all the elements present in the periodic table, how many different types of atoms would they find.
less than 10
more than 100
less than 100
more than 10000
In order to determine if two atoms are copper (Cu) atoms, what must be the same for each?
number of valence electrons
the number of protons
the charge of atoms
the size of the atom
Which of the statements is one of the conclusions that formed the basis of Dalton's atomic theory?
atoms of particular element all have the same number of protons
atoms are the smallest particles of matter and cannot be divided farther
atoms can only change into atoms of another element through nuclear reaction
atoms of gases have less mass than atoms of liquids and solids
Which best describes an atom
atoms are the smallest particles of matter that are still elements
atoms are composed of one or more elemtns in a fixed ratio
atoms are broken down by physically means into subatomic particles
atoms are tiny energy packets that produce a bean of light
Since sodium chloride is classified as a compound, a sample of it contains
atoms that are gases, liquids, and solids
more than one kind of atom
matter that cannot be reduced to atoms
a solution of atoms and molecules
What is true about nobel gases and their electron configuration
they do not form bonds
they are available to bond
the nucleus in each of the atoms has equal parts
the outer electrons in both atoms bond with metals only
When two nitrogen atoms combine, they form a
mixture
compound
molecule
liquid
Neutral atoms have an equal number of
electrons and neutrons
protons and neutrons
protons and electrons
protons, neutrons, and electrons
Each period of the periodic table ends with a
halogen
noble gas
metalloid
alkali metal
Moving across the period on the periodic table, each element gains one
oxidation number
proton
nucleus
neutron
A student has an assignment to construct a model of the element sodium, Na. How many protons should he display on his model?
10 protons
12 protons
11 protons
23 protons
A neutral atom is best described as having
more protons than neutrons
more electrons than protons
an equal number of protons and neutrons
an equal number of protons and electrons
What does the nucleus of an atom contain?
protons and neutrons
protons and electrons
electrons and neutrons
protons only
The atomic mass of an element equals the number of
protons plus neutrons
electrons
protons
protons plus electrons
The atomic number of an element is always equal to the number of
protons
protons plus electrons
neutrons
protons plus neutrons
Metal atoms will most likely form ions by the
loss of electrons
loss of protons
gain of electrons
gain of protons
Ionic bonds form when
metals combine with nonmetals
gas combines with another gas
metals combine with another metal
a nonmetal combines with a nonmetal
When a nonmetal bonds with another nonmetal, what type of bond is created?
ionic
covalent
metallic
nonexistent
All matter has two characteristics. these characteristics are that matter takes up space and matter has
mass
color
definite weight
definite shape
What is the formula for density?
density = weight/distance
density = length/time
density = mass/volume
density = volume/weight
In an ionic bond, which type of element forms a cation
metals
metalloids
nonmetals
noble gases
When nonmetals form ionic compounds they become ions with what charge?
positive
negative
When forming an ionic bond how many atoms of Sodium are needed to complete the bond between sodium and oxygen
1
2
3
Which family of elements when forming an ionic bond will receive a charge of 2+
Alkali Metals
Alkali Earth Metals
Halogens
Noble Gases
Covalent bonds always occur between what two types of elements SHARING electrons
Metal + Nonmetal
Nonmetal + Nonmetal
Metal + Metal
Metal + Metalloid
A single bond between nonmetals is sharing how many electrons?
1
2
3
4
What type of bond shares 4 electrons?
single
double
triple
quadruple
How many atoms of Chlorine are needed to complete a covalent bond with Oxygen?
1
2
3
4
