Unit 1-bonding, Structures & Properties

Question 1

What are atoms of elements

Answer 1

The building blocks which make up everything in the universe

Question 2

What can atoms join together to make

Answer 2

Bonds

Question 3

What happens when 2 or more atoms join together

Answer 3

They from a molecule

Question 4

What happens when the atoms are the same

Answer 4

It’s a molecule of an element

Question 5

How many atoms are diatomic atoms made up of

Answer 5

2

Question 6

What are the 7 diatomic elements in the periodic table

Answer 6

hydrogen, chlorine, bromine, oxygen, fluorine, iodine

Question 7

Why do atoms form bonds

Answer 7

To achieve the most stable outer electron arrangement- a full outer shell

Question 8

What are covalent bonds

Answer 8

When 2 positive nuclei are held together by their common attraction for the shared pair of negative electrons

Question 9

How are covalent bonds are formed

Answer 9

Between 2 non-metals (usually)

Question 10

What kind of level of attraction do covalent bonds have

Answer 10

Extremely strong forces of attraction

Question 11

How do atoms form bonds

Answer 11

Using the electrons in their outer most energy she
L

Question 12

What do bonding diagrams do

Answer 12

They give a simplified picture of an atoms outer electrons

Question 13

What do molecules exist in

Answer 13

3 dimensions

Question 14

What does the shape of a simple covalent molecule depend on

Answer 14

The number and orientation of bonds around the central atom

Question 15

What does the bond look like and its perspective when it’s a straight bond

Answer 15

A straight line, in the plane of the paper

Question 16

What does the bond look like and its perspective when it’s a wedge bond

Answer 16

A door stopper, coming towards you

Question 17

What does the bond look like and its perspective when it’s a dashed bond

Answer 17

Straight lines getting longer, going away from you

Question 18

What do you call one bond

Answer 18

Linear

Question 19

What do you call two bonds

Answer 19

Angular

Question 20

What do you call 3 bods

Answer 20

Triganol pyramidal

Question 21

What do you call 4 bonds

Answer 21

Tetrahedral

Question 22

What do covalent substances form

Answer 22

Either discrete molecular or giant network structures

Question 23

What are covalent molecular at room temp

Answer 23

Can be solids, liquids, or gases

Question 24

What happens when a covalent molecular compound melts or boils

Answer 24

The weak intermolecular force is broken and the strong covalent bonds are left intact.

Question 25

Do covalent molecular have high or low boiling pints

Answer 25

As there is less energy required they have lower melting and boiling points

Question 26

What are covalent networks

Answer 26

They exist as giant network structures held together strong covalent bonds

Question 27

Do covalent networks have high or low boiling points

Answer 27

As there is lots of energy required to break the strong covalent bonds there is a high melting and boiling points

Question 28

What are examples of covalent networks

Answer 28

Carbon in the form of graphite and silicon dioxide

Question 29

What state is covalent network at room temp

Answer 29

Solid

Question 30

What does the chemical formula of a covalent molecular substance give

Answer 30

The number of atoms present in the molecule

Question 31

What does the formula of a covalent network substance give

Answer 31

The simplest ratio of atoms in the substance

Question 32

Different elements form what kinds of bonds

Answer 32

Different kinds of bonds

Question 33

What is a valency

Answer 33

The ability of atoms to combine with other atoms

Question 34

What does an atoms valency depend on

Answer 34

How many outer electrons it has

Question 35

What does the compound name sometimes have

Answer 35

A prefix

Question 36

What dumber does mono mean

Answer 36

1

Question 37

What number does di mean

Answer 37

2

Question 38

What number does tri mean

Answer 38

3

Question 39

What number does tetra mean

Answer 39

4

Question 40

What number does penta mean

Answer 40

5

Question 41

What number does hexa mean

Answer 41

6

Question 42

What number does hepta mean

Answer 42

7