Science MCQs
Practice multiple choice questions with instant feedback. Select an option to see if you're correct.
Which of the following elements is a noble gas?
How many valence electrons does Nitrogen (Z=7) have?
What is the main difference between the isotopes of an element?
What is the electronic configuration of Calcium (Atomic Number = 20)?
An element has 3 shells and 2 electrons in its outermost shell. What is its atomic number?
Which of the following elements has a valency of 3?
How many periods contain 8 elements?
The element with the smallest atomic number in Period 3 is:
What is the mass number of the most common isotope of carbon?
How many electrons are needed for the M shell (n=3) to be completely filled?
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