9-CHEMISTRY - PERIODIC TABLE

Question 1

Before the development of protons, electrons and neutrons, what did scientist order the elements by?

Answer 1

Atomic weight

Question 2

what did Mendeleev do with the periodic table?

Answer 2

Mendel placed elements in more appropriate places grouping elements with similar properties so patterns could be seen this meant it sometimes left gaps or change the order of atomic weight

Question 3

what did Mendeleev do with gaps

Answer 3

he predicted the elements properties and what it would be like

Question 4

what are the elements on the modern periodic table arranged in?

Answer 4

Increasing atomic number

Question 5

what are the columns going down the periodic table called?

Answer 5

Group

Question 6

How does the number of electrons on the outside energy level correlate to the group It is in?

Answer 6

The number of electrons on the outside energy level of an atom is the same as the group. It is in on the periodic table.

Question 7

What do elements in the same group have?

Answer 7

Similar properties

Question 8

what a group 0 called and what are their proper?

Answer 8

Group 0 are called noble gases they are unreactive because they have a very stable electron arrangement (full outer shell)

Question 9

what does the boiling point do in noble gases as you go down the group?

Answer 9

The boiling point increases with the increasing of the atomic mass mass

Question 10

what are winning point and condescending point the same as?

Answer 10

Temperature

Question 11

what are group 1 metals called

Answer 11

Alkali metals

Question 12

how many electrons does group 1 elements have i
on the outer shell

Answer 12

1

Question 13

What are group 1 metals the most?

Answer 13

reactive

Question 14

What happens when they lose their outer electron?

Answer 14

It forms a full outer energy level and becomes stable

Question 15

why are group 1 metals stored in oil

Answer 15

stop oxidation

Question 16

group one maya,s have low

Answer 16

densities and float water

Question 17

what happens when group one metals react with a halogen

Answer 17

produces metal halides which are white soluble solids

Question 18

what happens when group 1 metals react with water

Answer 18

Produces an alkaline solution of the metal hydroxide plus hydrogen gas

Question 19

what does the reactivity of group 1 do when you go down

Answer 19

increase

Question 20

what are group 7 known as

Answer 20

Halogens

Question 21

What do group 7 metals do because they all have the same amount of electrons in the outer shell?

Answer 21

All react in a similar way

Question 22

group 7 are all non metals which consist of

Answer 22

molecules made up of pairs of atoms

Question 23

what does the boiling point of group 7 do as you move down the group

Answer 23

increases

Question 24

what does the reactivity of grou o7 do as you move down the group

Answer 24

decreases

Question 25

what do halogens form

Answer 25

form ions with a charge of 1- by gaining an electron when reacting with metals to form ionic compounds

Question 26

what happens in an equation when there is a more reactive halogen and a less reactive halogen within a compound?

Answer 26

The more reactive halogen will take the place of the less reactive halogen within the compound. Make sure to balance.

Question 27

What do the halogens form by sharing electrons with nonmetals?

Answer 27

covalent molecules

Question 28

where are metals found on the periodic table?

Answer 28

Metals are found in the centre and to the left and bottom of the periodic table

Question 29

what ion does two metals reacting make

Answer 29

positive ion

Question 30

what are the atoms in metal like?

Answer 30

Closely packed together within layers

Question 31

what are the electrons in a metal able to do?

Answer 31

delocalised I’m free to move through the metallic lattice. this creates a strong metallic bond