Periodic table, group 1, group 7

Question 1

Names of people who arranged the periodic table

Answer 1

Newland

Mendeleev

Question 2

How did Newland classify elements?

Answer 2

In order of their atomic weights

Question 3

What are columns in a periodic table called?

What are elements like in each columns?

Answer 3

Groups

Elements with similar properties

Question 4

Why is the table is called a periodic table?

Answer 4

Similar properties occur at regular intervals

Question 5

Characteristics of elements/metals in group 1

Answer 5

Low density
First three elements less dense than water

+1 when reacting with non-metal

Compounds: white solids that dissolve
in water to form colourless solutions

Reacting with water, releasing H2

Forming hydroxides that dissolve in water –> alkaline solutions

Question 6

The further down the group a “group 1” element is…

Answer 6

The more reactive it is

The lower its melting and boiling point

Question 7

Why did many other scientists criticize Newland’s work?

Answer 7

Many elements in one group have dissimilar properties
Two elements in one place on the table
No clear divisions between metal and non-metal

Question 8

Compared with group 1 metals, transitional metals are…

Answer 8

Higher melting points (except for mercury)

Higher densities

Stronger + harder

Much less reactive

Do not react as vigorously with water + oxygen

Question 9

Some other characteristics of transitional elements

Answer 9

Carry different charges

Form colored compounds

Useful as catalysts

Question 10

What are elements in group 7 and their ions called?

Answer 10

Halogen

Halide

Non-metal

-1

Question 11

In Group 7, the further down the group an element is…

Answer 11

Less reactive

Higher melting + boiling point