Atoms And Ions

Question 1

Define the terms Isotopes

Answer 1

Atoms with the same number of protons and different numbers of neutrons

Question 2

How do you calculate the relative atomic mass (RAM)?

Answer 2

(Mass x Abundance)+(Mass x Abundance)/
Total Abundance

Question 3

Name and state the use of one noble gas?

Answer 3

Liquid He used for cooling

Question 4

Why are atoms of noble gasses unreactive?

Answer 4

All of their electron shells are full, so they don’t need to gain or lose electrons

Question 5

Define the term ionic bonding

Answer 5

Electrostatic force of attraction between oppositely charged ions

Question 6

Explain why calcium oxide has a high melting point?

Answer 6

-Giant ionic structure with many ionic bonds
-Ionic bonds are strong
-Lots of energy required to break bonds

Question 7

State and explain whether calcium oxide conducts electricity as a solid?

Answer 7

-No
-Because ions cannot move