Science MCQs
Practice multiple choice questions with instant feedback. Select an option to see if you're correct.
What is valency?
Sodium (Na) has a valency of?
Oxygen has a valency of?
What is an ion?
A positively charged ion is called a?
A negatively charged ion is called a?
How is a sodium ion (Na⁺) formed?
How is a chloride ion (Cl⁻) formed?
What are isotopes?
Hydrogen has three isotopes: Protium Deuterium and?
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