chapter 2.5-2.6 (modern view of atomic structure, periodic table))

Question 1

how is the nucleous of the atom defined

Answer 1

• contains protons and electrons
• small compared to size of atom but super high density, contains almost all the atoms mass.

Question 2

What is the electron responsible for ?

Answer 2

Electrons are what differentiate different elements : there arrangement and how many there are, as they occupy the major volume of the atom, they intermingle with other elements .
- number of electrons effects how an element can react with others

Question 3

what is A and Z

Answer 3

A= mass number (protons + neutrons)
Z = atomic number (number of electrons and protons)

Z - A = nb of protons

Question 4

what are the properties of metals

Answer 4

• conduct heat
• confuct electricity
• malleabilty
• ductility
• lustrous apperence