Question 1
EasyQuestion
Atomic number equals number of:
Topic: Atomic Number Mass and Valency · Skill: Define atomic number and mass number
Focus · Grades 9-12
Assignment Practice
Atomic Data: Number, Mass, Isotopes And Symbols
Read atomic data like a chemist
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Section A: Atomic Number and Mass Number · 6 questionsSection B: Isotopes, Isobars and Symbols · 6 questions
Section A: Atomic Number and Mass Number
Calculate particle numbers from atomic data.
Choose the correct calculation.
Question 2
EasyQuestion
Mass number equals:
Topic: Atomic Number Mass and Valency · Skill: Define atomic number and mass number
Question 3
MediumQuestion
An atom has atomic number 6 and mass number 12. Number of neutrons is:
Topic: Atomic Number Mass and Valency · Skill: Calculate protons neutrons and electrons
Question 4
MediumQuestion
A neutral atom of sodium has atomic number 11. It has electrons:
Topic: Atomic Number Mass and Valency · Skill: Calculate protons neutrons and electrons
Question 5
AdvancedQuestion
An atom has 17 protons and 18 neutrons. Its mass number is:
Topic: Atomic Number Mass and Valency · Skill: Calculate protons neutrons and electrons
What this assignment covers
Students calculate protons, neutrons and electrons, interpret atomic notation, compare isotopes/isobars and practise first eighteen element symbols.
Skills and sections
Define atomic number and mass number, Calculate protons neutrons and electrons, Interpret atomic data to classify elements, Differentiate isotopes and isobars, Apply symbols for first eighteen elements
- Section A: Atomic Number and Mass Number: 6 questions
- Section B: Isotopes, Isobars and Symbols: 6 questions