Basics

Question 0

Crucial parts of mendeleevs design

Answer 0

Left gaps

Arranged in rows with similar properties

Question 1

Creator of periodic table

Answer 1

Dimitri Mendeleev

Question 2

Mendeleevs prediction

Answer 2

Gallium (eka- aluminium) estimated properties based on gaps

Question 3

Relative mass of an electron

Answer 3

1/1840

Question 4

Number above element and what it means

Answer 4

Mass number .protons + neutrons

Question 5

Number below element and what it means

Answer 5

Atomic number , number of protons

Question 6

Isotope definition

Answer 6

Same atom, different number of neutrons

Question 7

Ion definition

Answer 7

Atom or group of atoms with a positive or negative charge

Question 8

In which groups is the ionic charge linked to the group number

Answer 8

1 and 2

Question 9

-ide

Answer 9

When non metal atoms form ions

Question 10

Ionic bonds

Answer 10

Between negatively non metals and positively charged metals

Question 11

Ionic compounds are always

Answer 11

Electrically neutral

Question 12

Charge and symbol of ammonium

Answer 12

[Nh4]+

Question 13

Charge and symbol of sulfate

Answer 13

(So4)2-

Question 14

Charge and symbol of carbonate

Answer 14

(Co3)2-

Question 15

Charge and symbol of oxide

Answer 15

(O)2-

Question 16

Charge and symbol of nitrate

Answer 16

(No3)-

Question 17

Charge and symbol of hydroxide

Answer 17

(Oh)-

Question 18

-ate

Answer 18

Shows presence of oxygen

Question 19

Ionic compound arrangement

Answer 19

Lattice structure

Question 20

Significance of ionic bonds

Answer 20

Strong electrostatic forces from oppositely charged atoms

Question 21

Conditions required for conductivity

Answer 21

Must contain charged particles that are free to move

Question 22

Ionic substance conductivity

Answer 22

They are charged but held in the lattice, they can only move when aqueous or molten

Question 23

Typical melting boiling points of ionic compounds

Answer 23

High due to lattice and strong electrostatic forces

Question 24

Definition of salt

Answer 24

Product of acid and alkali

Question 25

A reaction from which an insoluble solid is produced from 2 soluble substances

Answer 25

Precipitation

Question 26

Separating a salt

Answer 26

Filtration followed by washing and drying

Question 27

All nitrates are

Answer 27

Soluble

Question 28

Most carbonates are

Answer 28

Insoluble (except sodium,potassium and ammonium)

Question 29

Most hydroxides are

Answer 29

Insoluble (except na, k and ammonium)

Question 30

Barium meals

Answer 30

Barium sulfate ingested and x ray taken , most other barium salts are toxic,

Question 31

Why is barium sulfate ok to eat

Answer 31

It's insoluble so it doesn't enter the blood

Question 32

Sodium flame colour

Answer 32

Yellow

Question 33

Potassium flame colour

Answer 33

Lilac

Question 34

Calcium flame colour

Answer 34

Red

Question 35

Copper flame colour

Answer 35

Green-blue

Question 36

Test for chloride ions

Answer 36

Precipitation test, drops of dilute nitric acid added, shaken. Drops of silver nitrate added, white precipitate of silver chloride formed

Question 37

Test for sulfate ions

Answer 37

Drops of dilute HCL added, shaken. Barium chloride added, white precipitate barium sulfate forms.

Question 38

Carbonate test

Answer 38

Limewater turns cloudy when co2 is bubbled through

Question 39

Non metal to non metal bond

Answer 39

Covalent bond

Question 40

Properties of simple covalent substances

Answer 40

Low melting Low boiling Weak forces between molecules

Question 41

Properties of giant molecular covalent substances

Answer 41

High melting/boiling | Strong bonds

Question 42

Differences and similarities between diamond and graphite

Answer 42

Similarly high boiling/melting Graphite soft diamond hard diamond doesn't conduct because no free e Graphite conducts because one free e each

Question 43

Immiscible

Answer 43

Can't mix permanently

Question 44

How to separate Immiscible liquids

Answer 44

Separating funnel, denser liquid bottom leaves first

Question 45

Rf value

Answer 45

Solubility, distance moved by compound/distance moved by solvent

Question 46

Uses of chromotography

Answer 46

Detecting fakes, forensics, food colouring id,