7.1 Elements

Question 1

What are elements?

Answer 1

Substances that are made up of just one type of atom

Air is mostly made up of oxygen and nitrogen

Question 2

What are metallic properties?

Answer 2

They tend to be shiny
Are solid at room temperature (except mercury)
Are good conductors of heat and electricity
Can be stretched into wires (ductile)
Can be hammered or bent into sheets (are malleable)

Question 3

What are some non-metallic elements?

Answer 3

They tend to be dull
Do not conduct heat or electricity
Break or crumble when bent (brittle)

Question 4

How many known elements are there?

Answer 4

118

Question 5

How many elements naturally occur?

Answer 5

91

Question 6

What does each element have that is unique?

Answer 6

A name and chemical symbol

Question 7

What order does the periodic table list the elements in?

Answer 7

Lightest to heaviest

Question 8

How many letters is the chemical symbol made up of?

Answer 8

1, 2 or 3

Question 9

What is always a capital letter?

Answer 9

The first letter of the chemical symbol

Question 10

What does monatomic mean?

Answer 10

Made up of single atom

Question 11

What are molecules

Answer 11

Clusters of atoms molecules

Question 12

What are lattices?

Answer 12

Large grid-like structures

Question 13

What are some physical properties of atoms?

Answer 13

Solid, liquid or gas
Melting and boiling Point
How well it conducts heat and electricity
If it can bend or if it breaks when a force is applied

Question 14

What are monatomic elements?

Answer 14

An element that consists of just single atoms

Question 15

Are monatomic elements common?

Answer 15

No they are rare, only 9/92 are naturally occurring elements

Question 16

What are most non-metallic elements made up of?

Answer 16

Molecules

Question 17

In a molecular elements, are all molecules identical in size, shape, number and types of atoms?

Answer 17

Yes

Question 18

What percentage of known elements are metals?

Answer 18

80%

Question 19

Do atoms in metals form lattices?

Answer 19

Yes, they don’t form molecules, instead they form lattices

Question 20

What makes atoms strong at room temperature?

Answer 20

The structure

Question 21

Can atoms move over each other in lattices

Answer 21

Yes and it doesn’t break the lattices

Question 22

Are there any non-metallic lattices?

Answer 22

Yes only a few though

Question 23

In a non-metallic lattice, are the atoms in a fixed position?

Answer 23

Yes and they are bound tightly to each other