periodic trends

Question 1

Dobereiner, what did he do?

Answer 1

Came up with triad

Question 2

What is a traid?

Answer 2

3 elements with similar properties.
Li, Na, K
Groups/family on the periodic table

Question 3

Newlands, what did he do?

Answer 3

Law of Octaves

Question 4

What is the Law of Octaves?

Answer 4

Every 8th element, properties repeat.

Question 5

Lothar Meyer, what did he do?

Answer 5

Arrangement of the elements by atomic mass, chemical properties repeat so many elements

Question 6

Dmitri Mendeleev, what did he do?

Answer 6

:Arrangement by increasing atomic mass
:Published table (aka got the credit)
:Could predict unknown elements and properties
**left gaps

Question 7

Henry Moseley, what did he do?

Answer 7

Arrangement by increasing atomic number

Question 8

Periodic Law

Answer 8

When elements are order by atomic #, there is a periodic table pattern to their chemical/physical properties

Question 9

All the different families on the periodic table

Answer 9

Alkali metals, Alkaline Earth metals, Inner transition metals, Transition metals, metalloids, Halogens, and noble gasses

Question 10

Vertical Columns

Answer 10

Family/group

Question 11

Rows

Answer 11

period/series

Question 12

Metalloids

Answer 12

B, Si, Ge, As, Sb, Te, Po

Question 13

Alkali Metals

Answer 13

1A,
unusually soft
Very reactive
Stored under a oil

Question 14

Alkaline Earth Metals

Answer 14

2A
not as soft as Group 1A
react more mildly
only react with water when it steams (100c)

Question 15

Halogens

Answer 15

7A
Unpleasant oder, will burn flesh
does not dissolve well in water
react with most metals and many non-metals

Question 16

Noble Gasses

Answer 16

8A
not very reactive, very stable
not form compounds with other elements

Question 17

Transition Metals

Answer 17

contain many every day metals
good electrical/heat conductors
ductile-can be stretched
Malleable-bent or shaped
Lustrous
Solid at room temp

Question 18

Inner Transition metals

Answer 18

lanthanide series then
actinide series

Question 19

Malleable

Answer 19

the ability to be easily changed into a new shape

Question 20

Ductile

Answer 20

the ability to conduct electricity easily.

Question 21

1A and 2A spell

Answer 21

Alkali metals and Alkaline Earth metals