Model of the atom, symbols, relative atomic mass, electronic charge, isotopes

Question 1

How is the periodic table ordered

Answer 1

Arranged in atomic number

Question 2

Why are elements in the same group

Answer 2

Same number of electrons in the outer shell and this gives them similar chemical properties

Question 3

How did Mendeleev organise the periodic table

Answer 3

He left gaps undiscovered elements and in some places he change the order based on atomic weight

Question 4

Properties of metals

Answer 4

From positive irons, strong but malleable, good heat and electrical conductors

Question 5

Group 0

Answer 5

Noble gases, have full outer shell, and reactive, the boiling points increase with increasing relative of atomic mass going down the group

Question 6

Group 1

Answer 6

Alkali metals, one electron and outer shell, reactive

Question 7

What is a displacement reaction

Answer 7

Reaction where are more reactive halogen takes the place of electro reactive halogen

Question 8

Properties of transition metals

Answer 8

They have ions with different charges, fem coloured compounds

Question 9

Transition metals differences to alkali metals

Answer 9

Transition metals are less reactive denser stronger harder