Questão 1
Questão
Label in correct place
Responda
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Atom
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Lattice
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Lustrous
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Molecule
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element
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monatomic
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Ductile
Questão 2
Questão
There are [blank_start]118[blank_end] known elements. They are displayed in a table called the [blank_start]periodic[blank_end] table. The elements are listed from [blank_start]lightest[blank_end] to [blank_start]heaviest[blank_end] and according to their [blank_start]properties[blank_end]
Responda
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118
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115
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122
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periodic
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chemical
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element
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lightest
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oldest
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newest
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heaviest
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heaviest
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newest
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oldest
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lightest
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properties
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abundance
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name
Questão 3
Questão
The symbols of elements follow [blank_start]different[blank_end] patterns. For some elements, the symbol is the first letter of its name. These elements include [blank_start]oxygen[blank_end] and [blank_start]neon[blank_end]. For some elements, the symbol is two letters derived from the beginning or part of its name. The first letter is always [blank_start]upper case[blank_end] and the second letter is always [blank_start]lower case[blank_end]. These elements include [blank_start]magnesium[blank_end] and [blank_start]chlorine[blank_end]. For other elements, the symbol comes from the name of the element in another language. These elements include [blank_start]sodium[blank_end] and [blank_start]tungsten[blank_end].
Responda
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different
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Identical
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oxygen
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chlorine
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sodium
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neon
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nitrogen
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niobium
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upper case
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lower case
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lower case
-
upper case
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magnesium
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sodium
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phosphorus
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chlorine
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flourine
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carbon
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sodium
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helium
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rubidium
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tungsten
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hydrogen
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cadmium
Questão 4
Questão
Which could be a correct symbol for a chemical element?
Questão 5
Questão
Atoms are the building blocks of matter.
Questão 6
Questão
Elements consist of one or two types of atoms.
Questão 7
Questão
There are three ways that atoms can be arranged in elements
Questão 8
Questão
The periodic table is an ordered listing of elements from lightest to heaviest.
Questão 9
Questão
Metallic elements are lustrous, malleable and poor conductors of heat.
Questão 10
Questão
Non-metallic elements are brittle, dull and poor conductors of electricity.
Questão 11
Questão
The chemical symbols of elements always start with the first letter of the element’s name
Questão 12
Questão
Molecular elements only ever contain two atoms in a molecule.
Questão 13
Questão
Which elements exist as molecular elements?
Questão 14
Questão
Match the element symbols with the diagrams of their structures.
Questão 15
Questão
Select the element that is most likely to be lustrous and a good conductor of electricity.
Questão 16
Questão
An element has the following properties:
poor conductor of electricity
exists as individual atoms
poor conductor of heat.
What type of element is this?
This type of element is [blank_start]monatomic[blank_end]
Questão 17
Questão
H2O - [blank_start]______[blank_end]
C6H12O6 - [blank_start]_____[blank_end]
CO2 - [blank_start]______[blank_end]
NaCl - [blank_start]_____[blank_end]
SiO2 - [blank_start]____[blank_end]
O2- [blank_start]____[blank_end]
CO- [blank_start]____[blank_end]
Responda
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water
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glucose
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carbon dioxide
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sodium chloride
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silicon dioxide
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oxygen
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carbon monoxide
Questão 18
Questão
Compounds are substances made up of more than [blank_start]one type of atom[blank_end]. The properties of compounds are usually [blank_start]different from[blank_end] the properties of the elements that make them up. Some compounds, such as water and sugar, are made up of [blank_start]molecules[blank_end]. Other compounds, such as table salt and beach sand, are [blank_start]a lattice[blank_end].
Responda
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one type of atom
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one or two types
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different from
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similar to
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molecules
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atoms
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a lattice
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elements
Questão 19
Questão
If a substance contains only one type of atom, it is [blank_start]______[blank_end]
If a substance contains more than one type of atom, it may be a compound or [blank_start]______[blank_end]
If a substance contains clusters of different types of atoms, it is [blank_start]_____[blank_end]
If a substance contains atoms very strongly bonded to each other and in a regular arrangement, it is a [blank_start]____[blank_end]
If a substance contains more than one element or compound, it is a [blank_start]______[blank_end]
An alloy is an example of [blank_start]____[blank_end]
Responda
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a compund
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an element
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a molecule
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an element
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a mixture
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an elemental compound
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a lattice compound
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a molecular compound
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compound lattice
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molecular compound
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compound
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lattice
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mixture
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a mixture
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an element
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a compund
Questão 20
Questão
Complete the following with the element name and number of atoms in a molecule that has the formula C3H7Cl
H
Element name - [blank_start]_______[blank_end]
Number of molecules in atom - [blank_start]______[blank_end]
C
Element name - [blank_start]_______[blank_end]
Number of molecules in atom - [blank_start]______[blank_end]
Cl
Element name - [blank_start]_______[blank_end]
Number of molecules in atom - [blank_start]______[blank_end]
Responda
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Hydrogen
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7
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Carbon
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3
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Chlorine
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1