periodic table

Question 1

vertical column in periodic table

Answer 1

groups

Question 2

horizontal column in periodic table

Answer 2

periods

Question 3

metallic character decreases when we move from..

Answer 3

left to right

Question 4

elements in same period have ..

Answer 4

same number of electron shells

Question 5

as we move down a group

Answer 5

metallic character increases as size of atoms increase electrons are further away from nucleus , forces of attraction between nucleus and electron not strong =easily lost = increase metallic character

Question 6

why do larger atoms lose their electrons easily

Answer 6

electrons are further away from nucleus , forces of attraction between nucleus and electron not strong =easily lost

Question 7

elements in the same group have same …

Answer 7

same number of valence electrons

Question 8

group 1 metals are also known as

Answer 8

• alkali metals which are soft and have low melting /boiling points and densities
• melting / boiling pt decrease and densities increase as we go down group
• highly reactive with water to form alkali + H2 as we go down group

Question 9

group 1 metals + non-metals =

Answer 9

ionic salts which are soluble in water

Question 10

grp 7 elements are called ?

Answer 10

halogens , found as diatomic molecules and simple covalent molecules and have low melting and boiling point

Question 11

halogens are highly ?

Answer 11

reactive as they need only one electron to attain stable octet configuration

Question 12

halogen reactivity..

Answer 12

decreases = larger halogens do not gain electrons as easily as smaller ones

Question 13

halogens undergo what reactions ?

Answer 13

displacement , more reactive halogen displaces a less reactive halogen from its salt .

Question 14

transition metals

Answer 14

• have melting and boiling points and high densities
• have variable oxidation
• good catalysts