Chemistry - Chapter 1

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What is a element?
A pure substance only made up of one type of atom.
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What is an atom?
Is the smallest part of an element.
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What is an compound?
Is made of two or more atoms chemically bonded together.
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What is an molecule?
Smallest part of an compound, made of two or more atoms bonded together.
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What is an mixture?
Made of two or more substances, not bonded together.
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What is a electron?
A negative atomic particle with charge of -1.
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What is an proton?
A positive atomic particle with charge of +1.
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What is an neutron?
Atomic particle with no charge.
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An atom consists of...?
A nucleus surrounded by electrons.
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What does the electron equal to?
Proton.
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How much electrons can the first, second and third electron shell have?
First: 2 Second: 8 Third: 8.
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Energy of electron shells _________ with the __________ number of electrons
1) Increases 2) Increasing.
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What is ionic bonding?
When atoms lose or gain an electron to form charged particles.
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What is a covalent?
Is the sharing of an atom.
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What type of bonds do compounds formed from non-metals contain?
Covalent bonding.
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Which does the nucleus contain?
Protons and Neutrons
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What does a compound formed from a metal and a non-metal consist of?
It consists of ions.
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What are the groups in the periodic table?
A column of similar elements.
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What do the elements in a group have the same number of?
Electrons in the highest occupied energy level or outer shell
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What is the atomic number of an atom?
It is the number of protons it contains.
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What is the correct chemical symbol for sodium?
Na
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What do the elements in a period have the same number of?
The elements in a period have the same number of occupied energy levels or shells.
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Why is sodium stored under oil?
To stop it reacting with air and water
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Where are the transition metals in the periodic table?
They are at the centre/middle of the periodic table
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Give 3 properties of transition metals
They form coloured compounds / They are less reactive than alkali metals such as sodium / High densities / They have higher melting points / Good conductors of heat and electricity
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Other cards in this set

Card 2

Front

Is the smallest part of an element.

Back

What is an atom?

Card 3

Front

Is made of two or more atoms chemically bonded together.

Back

Preview of the back of card 3

Card 4

Front

Smallest part of an compound, made of two or more atoms bonded together.

Back

Preview of the back of card 4

Card 5

Front

Made of two or more substances, not bonded together.

Back

Preview of the back of card 5
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