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WorksheetsPre-Test Chemistry
Total questions: 62
Worksheet time: 10hrs 37mins
What does a represent?
Proton
Neutron
Electron
What does b represent?
Proton
Neutron
Electron
What does c represent?
Proton
Neutron
Electron
What is the atomic mass of this element?
20
60
40
41
What is the symbol of this element?
Calcium
P
Ca
C
protons
negative charge, nucleus
positive charge, shells
positive charge , nucleus
neutral charge, nucleus
neutrons
no charge, shells
positive charge, nucleus
neutral, no charge, nucleus
negative charge, shells
electrons
no charge, nucleus
positive charge, nucleus
negative charge, shells
negative charge, nucleus
What is the number of protons that the element in this image contain?
14
7
15
18
True or False? Neutrons have a negative charge
True
False
What is the atomic number of this element?
20
60
40
41
An electron is
positively charged
neutral
negatively charged
atomic number is
the number of protons
the number of electrons
the number of neutrons
the location of an atom on the periodic table
Atomic Mass is the number of
protons and neutrons in the nucleus of an atom
protons and electrons in the nucleus of an atom
neutrons and electrons in the nucleus of an atom
Conservation of mass means
all the atoms present before a chemical reaction are not present after
atoms present before chemical reactions are present after
new substances and new elements are formed in a chemical reaction
An elements is
a substance that cannot be split into simpler substances
a substance that can be split into simpler substances
A molecule is
a singular particle of a particular element
another name for an element
2 or more atoms that are combined
which of the statements on physical changes are correct
A physical change cannot be reversed
A physical change is a change in state
A physical change is a change in form
A physical change is where new substances are formed
Signs of a chemical change include;
change of colour, change of temperature, precipitate (solid) formed, gas released.
change of colour, reversing back to original form, precipitate (solid) formed, gas released.
Water is the product of the reactants:
oxygen and water
oxygen and carbon
hydrogen and oxygen
The type of reaction that releases energy as heat is called
endothermic
exothermic
respiration
photosynthesis
which of the following are the characteristics of a chemical reaction (choose multiple answers)
change of state
change of colour
change of precipitation
formation of precipitation
change of smell
when a substance does not undergo a chemical reaction is known as a chemical change
true
false
the chemical reactions which proceed with the release _________ are called _______________________________
heat energy , endothermic reaction
heat energy , exothermic reaction
light energy , endothermic reaction
light energy , exothermic reaction
on which side are the reactants written
left hand side
right hand side
middle
nowhere
which is the odd one out : PRODUCTS , REACTANTS , PLUS SIGN , ARROW , MINUS SIGN
PRODUCTS
REACTANTS
PLUS SIGN
ARROW
MINUS SIGN
products are always written on the
right hand side
left hand side
middle
none
a chemical equation that represents a chemical reaction briefly in words is called chemical equation
true
false
cant tell
none
The vertical (up and down) columns in the Periodic Table are called
groups
towers
periods
atomic numbers
The horizontal (side to side) rows in the Periodic Table are called
groups
families
periods
atomic numbers
What are the three main groups of the periodic table?
groups
metal
nonmetals
metalloids
periods
Which of the following elements is a non-metal in group 14?
Carbon (C)
Silicon (Si)
Tin (Sn)
Lead (Pb)
Which two elements are in the same period?
boron (B) and lithium (Li)
beryllium (Be) and calcium (Ca)
phosphorus (P) and oxygen(O)
boron (B) and phosphorus (P)
Metals are located on the
________ side of the
Periodic Table.
ZIG-ZAG
LEFT
RIGHT
BOTTOM
Find the element on Period 3 and Group 17. What is
this element’s chemical symbol?
F
Br
Cl
I
What are the three particles that make up the atom?
protons, neutrons and isotopes
protons, negatives and electrons
neutrons, isotopes and electrons
protons, neutrons and electrons
An element with a mass number of 10 and an atomic number of 6 has how many neutrons?
6
8
4
10
How many valence (outer) electrons does an Oxygen atom have?
2
6
8
16
What does the Bohr Model represent?
The structure of molecules
The structure of the Solar System
The structure of an atom
The structure of East Hills
In the molecule C6H12O6, how many hydrogen atoms are there?
1
6
12
24
How many energy levels does this element have?
6
2
4
5
This is a correct dot diagram for neon (Ne)
true
false
