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GCSE Chemistry > C3.1 - Introducing chemical reactions > Flashcards

C3.1 - Introducing chemical reactions Flashcards

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1
Q

Give the formula for iron

A

Fe

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2
Q

Give the formula for sodium

A

Na

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3
Q

Give the formula for potassium

A

K

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4
Q

Give the formula for zinc

A

Zn

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5
Q

Metals are represented in equations by their…

A

Empirical formulae

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6
Q

Ionic compounds are represented in equations by their…

A

Empirical formulae

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7
Q

Simple covalent molecules are represented in equations by their…

A

Molecular formulae

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8
Q

The group 0 elements exist as…

A

Individual atoms

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9
Q

The group 7 elements exist as…

A

Diatomic molecules

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10
Q

Hydrogen exists as…

A

a diatomic molecule

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11
Q

Oxygen exists as…

A

a diatomic molecule

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12
Q

Nitrogen exists as…

A

a diatomic molecule

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13
Q

Sulfur exists as

A

a simple covalent molecule

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14
Q

Phosphorus exists as…

A

a simple covalent molecule

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15
Q

Silicon exists as…

A

a giant covalent structure

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16
Q

Carbon exists as

A

a giant covalent structure

17
Q

Give the formula for silicon

A

Si

18
Q

Give the formula for carbon

A

C

19
Q

Atoms cannot be created or destroyed in chemical reactions. This is known as…

A

Conservation of mass

20
Q

What does this state symbol mean?

aq

A

Aqueous solution (dissolved in water)

21
Q

What is the unit for amount of substance?

A

The mole (mol)

22
Q

How many moles of atoms are contained in 1 mole of water molecules?

A

3 moles

23
Q

How many moles of atoms are contained in 4 moles of carbon dioxide molecules

A

12 moles

24
Q

Avogadro’s constant is defined as…

A

The number of entities in 1 mole

25
Q

The mass of 1 mole of a substance is known as the…

A

molar mass

26
Q

What are the units of molar mass?

A

g/mol

GCSE Chemistry (1 decks)

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