Periodic Table

Question 1

how are the elements in the periodic table arranged?

Answer 1

in increasing proton number from left to right

Question 2

what is the horizontal row of the periodic table called?

Answer 2

period

Question 3

what is the vertical column of the periodic table called?

Answer 3

group

Question 4

what are the elements between group II and group III called?

Answer 4

transition elements or transition metals

Question 5

what is the pattern between elements in the same group?

Answer 5

they have the same number of valence electrons

Question 6

what is the pattern between elements with the same number of valence electrons?

Answer 6

they have the same chemical properties

Question 7

what is the pattern between elements in the same period?

Answer 7

they have the same number of electron shells

Question 8

what are group I elements called?

Answer 8

alkali metals

Question 9

what are some properties of alkali metals?

Answer 9

• most reactive metals in periodic table
• only have one valence electron
• shiny, silvery solids
• soft and can be easily cut with a knife
• have low densities
• low MP
• tarnish easily in air
• react vigorously in cold water

Question 10

what is the pattern of alkali metals?

Answer 10

• MP decreases down the group

- chemical reactivity increases down teh group

Question 11

what are group VII elements called?

Answer 11

halogens

Question 12

what are some properties of halogens?

Answer 12

• reactive
• poisonous
• have seven valence electrons
• diatomic
• low MP BP
• can form ionic compounds or covalent compounds

Question 13

what is the pattern of halogens?

Answer 13

• MP BP increases down the group
• chemical reactivity decreases down the group
• colour becomes darker down the group

Question 14

what is the colour and state of fluorine?

Answer 14

pale yellow

gas at r.t.p

Question 15

what is the colour and state of chlorine?

Answer 15

greenish yellow

gas at r.t.p

Question 16

what is the colour and state of bromine?

Answer 16

reddish brown

liquid

Question 17

what is the colour and state of iodine?

Answer 17

• purplish black, solid

- yellowish brown, aqueous

Question 18

what is the colour and state of astatine?

Answer 18

black

solid

Question 19

what is a displacement reaction?

Answer 19

a more reactive halogen will displace a less reactive halogen from an aqueous solution of its ions

Question 20

what are group 0 elements called?

Answer 20

noble gases

Question 21

what are some properties of noble gases?

Answer 21

• least reactive elements
• have stable electronic arrangement
• unreactive and do not form bonds
• colourless
• mono atomic gases
• low MP BP

Question 22

what is the use of helium?

Answer 22

-fill balloons and modern airships because they are light and unreactive

Question 23

what is the use of neon?

Answer 23

advertising strip lights as they are unreactive and can give off a distinct orange glow

Question 24

what is the use of argon?

Answer 24

fill light bulbs, steel production as they are unreactive

Question 25

why are noble gases unreactive?

Answer 25

have filled valence electron shell so don’t need to gain, lose or share electrons to form bonds, stable and unreactive