Topic 2: Structure of an Atom + Ions

Question 1

The nucleus contains positive charge, called ____, and neutral charge, called ___.

Answer 1

• protons
• neutrons

Question 2

ORBITING the nucleus are ___, which are ____ charged

Answer 2

• electrons
• negatively

Question 3

What does it mean when atoms are regularly electrically neutral? (2)

Answer 3

• The number of electrons and protons are equal
• neutrons may not be equal to these

Question 4

What is an ion?

Answer 4

• If an atom loses or gains and election, it is not longer neutral

Question 5

what is an anion

Answer 5

• if an atom gains elections and becomes a negative ion

Question 6

What is a cation?

Answer 6

If an atom loses electrons and becomes a positive ion

Question 7

Name some important ions (electrolytes, which dissociates in water) (5)

Answer 7

• calcium, Ca2+
• Sodium, Na2+
• Potassium, K+
• hydrogen, H+
• Chloride, Cl-