National 5 Chemistry Unit Test 1 -atomic Structure & Rates Of Reaction

Question 1

What’s the mass number of an atom equal to

Answer 1

Protons + neutrons

Question 2

What’s an endothermic reaction

Answer 2

A reaction that absorbs heat from its surroundings

Question 3

What’s an isotope

Answer 3

Same atomic number different mass number

Question 4

What’s an ion

Answer 4

An atom or group of atoms that has an electric charge