2.0 Atomic structure and the Periodic Table

Question 1

Subatomic particles

Answer 1

Question 2

what are atoms

Answer 2

• smallest parts of an element that can take place in chemical reactions
• made up of mostly empty space around a dense nucleus that contains protons and neutrons
• nucleus has an overall positive charge
• negatively charged electrons are found in orbitals in the empty space around the nucleus

Question 3

What is an Isotope

Answer 3

• a variant of a chemical element that has the same number of protons (and thus the same atomic number) but a different number of neutrons in its atomic nucleus
• same atomic number different mass number

Question 4

ionisation energy

Answer 4

• the amount of energy required to remove one mole of electrons from one mole of a gaseous atoms of an element to form one mole of gaseous ions