1.14-1.17 atomic structure

Question 1

atom definition

Answer 1

The smallest part of an element that can exist

Question 2

molecule definition

Answer 2

Two or more atoms joined together by covalent bonds

Question 3

describe the structure of an atom

Answer 3

• in the nucleus :
  protons & neutrons
• surrounding the nucleus:
  electron shells with electrons

Question 4

state the mass and charge of the neutrons, electrons and protons

Answer 4

charge mass

proton +1 1

neutron 0 1

electron -1 0

Question 5

what is meant by atomic number and what does it show

Answer 5

the atomic number (usually on the bottom left) shows the number of protons in a nucleus

Question 6

what is meant by mass number and what does it show

Answer 6

the mass number (usually the top left) shows the number of neutrons and protons

Question 7

what is meant by isotopes

Answer 7

different atoms of the same element that contain the same number of protons but a different number of neutrons

Question 8

how do you calculative relative atomic mass

Answer 8

1. times the isotope abundance by isotope mass for both
2. add the two results together
3. divide by sum of abundance of all isotopes