C1 1.1 - 1.5

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What are all substances made from?
Atoms
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How many different types of atoms are there
100
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Around the nucleus, in energy levels, there are ________
Electrons
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In the nucleus of an atom you can find _____ and _____
Protons / Neutrons (or vice versa)
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What charge do electrons have?
- 1
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What charge do protons have?
+ 1
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What charge do neutrons have?
0
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Why are atoms always neutral?
The electron number = proton number so they cancel each other out. Neutrons have a zero charge also so overall there is no charge.
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What can proton number also be called?
Atomic Number
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How do you calculate mass number?
proton number + neutron number
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What is the pattern for the first three energy levels?
2,8,8
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What do atoms in the same group share in common?
The same number of electrons on their outermost energy level
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What is special about neon and argon?
They are nobel gases (they have full outermost shells).
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How are ions formed?
When a metal bonds with a non-metal
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What charge do metal ions form?
positively charged ions
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What charge do non-metal ions form?
negatively charged ions.
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What is the name of the bond between the metal and non-metal ions?
Ionic bond
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Why do the metal and non-metal compounds have no overall charge?
the charges of the ion cancel each other out.
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How are covalent bonds formed?
When two or more non-metals bond.
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What is a covalent bond?
When two + non-metals share their electrons on their outermost shells.
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Metal ions form _____ ions because they ______ one or more electrons when they bond with a non-metal
positive / lose
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Non-metals atoms ______ electrons in the reaction, forming ______ ions
gain / negative
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When non-metals combine with each other, they form ______ bonds. Their atoms _____ electrons
covalent / share
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What happens in a positive test for hydrogen gas?
A lightened wooden splint makes a popping sound
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Why must all symbol equations be balanced?
Atoms cannot be created or destroyed in chemical reactions.
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Other cards in this set

Card 2

Front

How many different types of atoms are there

Back

100

Card 3

Front

Around the nucleus, in energy levels, there are ________

Back

Preview of the front of card 3

Card 4

Front

In the nucleus of an atom you can find _____ and _____

Back

Preview of the front of card 4

Card 5

Front

What charge do electrons have?

Back

Preview of the front of card 5
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