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Chemistry > Chemistry Terminology Level 2 > Flashcards

Chemistry Terminology Level 2 Flashcards

1
Q

Define Element

A

Contains only ONE type of ATOM, And Cannot be broken into something smaller.

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2
Q

Define Compound

A

A Substance that is composed of Two or more different Elements

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3
Q

Define Mixture

A

A combination of substances that are non reactive

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4
Q

What is Avogadros Constant?

A

6.02214 x 10 to 23 Mol-1

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5
Q

What is a molecule?

A

Two atoms bonded together

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6
Q

What is the difference between Compounds and Mixtures

A

A compound is made up of elements bonded together while a mixture has incredients that are not bonded together.

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7
Q

How do you calculate the number of neutrons in an element?

A

The Mass number minus the Atomic Number. (it will be a positive number because you cant have negitive mass)

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8
Q

How do you calculate the Number of Electrons in an Elelement?

A

The number of Electrons is equal to the Mass number

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9
Q

What kind of Bonding occurs between a Metal and a Non Metal?

A

Ionic Bonding

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10
Q

What Kind of bonding occurs between two Non metal elements?

A

Covalent Bonding

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11
Q

What is an Ionic Bond?

A

The attraction between two opposidtley charged Ions

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12
Q

What is an Ion

A

An atom of an element which is charged (due to loosing or gaining an electron)

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13
Q

Give an example of an Giant Ionic Lattice

A

Salt NaCL is a giant ionic lattice

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14
Q

what is the Ph scale?

A

The way we measure acidicty or alkalinity

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15
Q

What is an Acid on the ph scale

A

0-6.5

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16
Q

What is a base on the ph scale

A

7.5-14

17
Q

What is the difference between a Base and An Alkali

A

Alkalis are bases which are dissovled into water (or another soulte)

18
Q

What is neutral on the ph scale

A

6.5-7.5

19
Q

What is the first aid advice for an Acid Attack? Why?

A

Irrigate the wound with water and with cows Milk because cows milk is slighlty Alkalai and will neutralise the acid.

20
Q

What is a molecule?

A

Two or more atoms bonded together

21
Q

What are the properties of Giant Ionic Lattices?

A

They Conduct electricity in aqueous solution
They have a High melting point
They are soluble in water

22
Q

Why is NaCl (Sodium Chloride) soluble in water?

A

The water molecules are Polarized, and therefore can pull apart the Ionic bonds between Na and Cl easily.

23
Q

Why is the Melting point of sodium 806 degrees Celsius?

A

The Ionic bonds between Na and Cl are strong.

24
Q

How do you make Ionic structures conduct electricity?

A

Melt them or dissolve them in water

25
Q

Why does Na Cl conduct electricity? (when molten or dissolved in water)

A

Because the Ions are free to move, hit each other and conduct electricity.

26
Q

Why isn’t NaCl conductive when solid?

A

The Ions are fixed in a lattice shape.

Chemistry (1 decks)

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