Structure And Bonding

Question 0

Which atoms usually gains electrons to form negative ions?

Answer 0

Non-metal atoms

Question 1

What formula belongs to a ion?

Answer 1

Na+

Question 2

Metal atoms form:

Answer 2

Positive ions by losing electrons

Question 3

In ionic bonding:

Answer 3

Oppositely charged ions attract

Question 4

Sodium chloride conducts electricity when:

Answer 4

molten or in solution

Question 5

Structure of magnesium oxide is a:

Answer 5

Giant ionic lattice

Question 6

Why does sodium chloride have a low melting point the magnesium chloride?

Answer 6

Because the positive ions are larger but have small charge

Question 7

Explain the conductivity of sodium chloride:

Answer 7

It conducts electricity when molten because it’s ions are free to move

Question 8

How many electrons are involved in each convelent bond?

Answer 8

Two

Question 9

Which sort of elements form covalent bonds?

Answer 9

Non metals

Question 10

What has molecules of two atoms joined by a covalent bond?

Answer 10

Chlorine

Question 11

What does covalent bond involved?

Answer 11

Sharing electrons between atoms

Question 12

Name one molecule compound?

Answer 12

hydrogen chloride

Question 13

Where do electrons in a covalent bond come from?

Answer 13

The highest occupied energy level

Question 14

Nitrogen is in group 5 of the periodic table. how many covalent bonds can it form?

Answer 14

Three

Question 15

Name a element which normally forms four covalent bonds

Answer 15

Carbon

Question 16

What kind of structure do diamond and graphite have?

Answer 16

Giant molecular structures

Question 17

Why might fullerenes be used in new drug delivery systems?

Answer 17

Because they are hollow

Question 18

In what physical state or states do Ionic substances conduct electricity?

Answer 18

Liquid state or dissolved in water

Question 19

How does the structure of nano tubes make them suitable Catalysts?

Answer 19

Large surface area

Question 20

What type of bonding is present in metals?

Answer 20

Metallic bonding

Question 21

Metals have high melting points because:

Answer 21

They have strong bonds

Question 22

Polymers with cross links are:

Answer 22

Thermosetting polymers

Question 23

What is copper used to make electrical wiring?

Answer 23

Because it’s a good conductor of electricity

Question 24

Can you name the approximate size of a typical nano particle?

Answer 24

Approximately 50nm

Question 25

What is a nano particle?

Answer 25

Particle of nano scale

Question 26

metals conduct electricity because?

Answer 26

They contain electrons which are free to move

Question 27

When a substance of a similar molecule structure boils,which bonds are broken?

Answer 27

Intermolecular bonds