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WorksheetsChemical Reactions Test Review
Total questions: 43
Worksheet time: 27mins
What is an electron’s charge?
positive
negative
no charge
What is a proton’s charge?
positive
negative
no charge
What is a neutron’s charge?
positive
negative
no charge
Two of the same charges will ___.
attract
repel
Two of the opposite charges will __.
attract
repel
An electron and a proton will ___.
attract
repel
The importance of a proton is that it determines the __ of the atom.
identity
together
reactivity
The importance of an electron is that it is responsible for the __ of the atom.
identity
together
reactivity
The importance of a neutron is that it holds the nucleus __.
identity
together
reactivity
Protons are found __.
inside nucleus
outside nucleus
Electrons are found __.
inside nucleus
outside nucleus
Neutrons are found __.
inside nucleus
outside nucleus
made of only one type of atom
mixture
molecule
element
two or more atoms are chemically bonded together
mixture
molecule
element
different types of atoms or molecules that are mixed together but not bonded
mixture
molecule
element
the temperature at which a substance changes from a solid to a liquid
substance
melting point
atoms
property
boiling point
the temperature at which a substance changes from a liquid to a gas
substance
atoms
melting point
property
boiling point
something that is made of all the same atoms or groups of atoms
substance
atoms
melting point
property
boiling point
something that can be observed about a substance, such as color, smell, or boiling point
substance
atoms
melting point
property
boiling point
the tiny pieces that all matter – all the stuff in the world – is made of
substance
atoms
melting point
property
boiling point
a group of atoms joined together in a particular way
scale
extended structure
model
molecule
subatomic particle
a structure formed by repeating groups of atoms that link together in a large network
scale
extended structure
model
molecule
subatomic particle
an object, diagram, or computer program that helps us understand something by making it simpler or easier to understand
scale
extended structure
model
molecule
subatomic particle
the relative size of things
scale
extended structure
model
molecule
subatomic particle
a process in which atoms rearrange to form new substances
chemical formula
chemical reaction
product
reactant
an ending substance that is made during a chemical reaction
chemical formula
chemical reaction
product
reactant
a starting substance that is part of a chemical reaction
chemical formula
chemical reaction
product
reactant
letters and numbers showing the types and number of atoms that repeat to make up a substance
chemical formula
chemical reaction
product
reactant
During a chemical reaction, atoms stay the same type (a hydrogen at the beginning will be a hydrogen at the end)
true
false
During a chemical reaction, atoms rearrange to form different groups of atoms
true
false
During a chemical reaction, ALL of the atoms that make up the reactants rearrange to form the products.
true
false
During a chemical reaction, some atoms may get destroyed.
true
false
What is the missing letter?
4 (a) + O2 = 2K2O
What is the missing element?
P4 + 3O2 = 2 (a) 2O3
What is the missing element?
C (a) 4 + 2Br2 = CBr4 + 2F2
What is the missing element?
(a) + 2HCl = ZnCl2 + H2
2Na + 2H20 = 2 (a) OH + H2
What is the missing element?
2ZnS + 3O2 = 2ZnO + 2 (a) O2
What is the missing number?
(a) Li + F2 = 2LiF
What is the missing number?
C + H2O = CO + H (a)
What is the missing number?
(a) K + 2H2O = 2KOH + H2
What is the missing number?
2Ag2O = (a) Ag + O2
What is the missing number?
SnO2 + 2H2 = Sn + (a) H2O
