Chemistry Terminology Level 2

Question 1

Define Element

Answer 1

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

Question 2

Define Compound

Answer 2

A Substance that is composed of Two or more different Elements

Question 3

Define Mixture

Answer 3

A combination of substances that are non reactive

Question 4

What is Avogadros Constant?

Answer 4

6.02214 x 10 to 23 Mol-1

Question 5

What is a molecule?

Answer 5

Two atoms bonded together

Question 6

What is the difference between Compounds and Mixtures

Answer 6

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

Question 7

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

Answer 7

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

Question 8

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

Answer 8

The number of Electrons is equal to the Mass number

Question 9

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

Answer 9

Ionic Bonding

Question 10

What Kind of bonding occurs between two Non metal elements?

Answer 10

Covalent Bonding

Question 11

What is an Ionic Bond?

Answer 11

The attraction between two opposidtley charged Ions

Question 12

What is an Ion

Answer 12

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

Question 13

Give an example of an Giant Ionic Lattice

Answer 13

Salt NaCL is a giant ionic lattice

Question 14

what is the Ph scale?

Answer 14

The way we measure acidicty or alkalinity

Question 15

What is an Acid on the ph scale

Answer 15

0-6.5

Question 16

What is a base on the ph scale

Answer 16

7.5-14

Question 17

What is the difference between a Base and An Alkali

Answer 17

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

Question 18

What is neutral on the ph scale

Answer 18

6.5-7.5

Question 19

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

Answer 19

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

Question 20

What is a molecule?

Answer 20

Two or more atoms bonded together

Question 21

What are the properties of Giant Ionic Lattices?

Answer 21

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

Question 22

Why is NaCl (Sodium Chloride) soluble in water?

Answer 22

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

Question 23

Why is the Melting point of sodium 806 degrees Celsius?

Answer 23

The Ionic bonds between Na and Cl are strong.

Question 24

How do you make Ionic structures conduct electricity?

Answer 24

Melt them or dissolve them in water

Question 25

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

Answer 25

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

Question 26

Why isn’t NaCl conductive when solid?

Answer 26

The Ions are fixed in a lattice shape.