International
Resources
Education Jobs
Schools directory
News
Courses
Store

Tes for schools Log in Register for free

Resources Education Jobs Schools directory News Magazine Courses Log out Help

Home feed

My list

Courses My Jobs Job alerts My CV Career preferences Resources Author dashboard

Settings

Edit account Log out

Home Resources Jobs Schools directory News Magazine Courses Register for free Log in Help

Register for free

Already registered?

Log in

Education jobs

My jobs Job alerts My CV Career preferences

Resources

Downloads Saved resources Author dashboard Add resource

Courses

Access courses

News

Magazine Subscriptions Payments

About us My products Tes for schools Work for Tes

Miss Ramo´s Shop

Add a resource
Edit shop

Miss Ramo´s Shop

Edit shop
Add a resource

7Uploads

658Views

4Downloads

All resources
Biology
Chemistry
World languages

World languages

Isotopes and Atomic Mass – KS3 Science Worksheet with PhET Simulation (Year 8)

Isotopes and Atomic Mass – KS3 Science Worksheet with PhET Simulation (Year 8)

$1.34

(0)

Jobs home UK International Australia Primary / Elementary Secondary / High school Careers advice Tes for schools

Courses home For prospective teachers For teachers For schools For partners

Resources home Early years / Pre-K and Kindergarten Primary / Elementary Middle school Secondary / High school Whole school Special Educational Needs Blog

Store home Magazine

News Magazine New teachers Partners

Select country

Copyright © 2026

Chat About us Corporate FAQs Contact us Privacy notice General Terms of Business Accessibility statement Fair recruitment policy Takedown Work for Tes Tes research panel Modern slavery statement Children's Privacy Notice

This website and its content is subject to our Terms and Conditions. Tes Global Ltd is registered in England (Company No 02017289) with its registered office at Building 3, St Paul’s Place, Norfolk Street, Sheffield, S1 2JE