Science MCQs
Practice multiple choice questions with instant feedback. Select an option to see if you're correct.
The electronic configuration of an element is 2,8,7. What is its atomic number?
Which period contains the element with the electronic configuration 2,8,4?
The element with electronic configuration 2,8,8 is in which group?
What is the mass number of an atom with 11 protons, 12 neutrons, and 11 electrons?
Which of these is the correct symbol for an atom with 17 protons, 18 neutrons, and 17 electrons?
An atom has 18 protons, 22 neutrons, and 18 electrons. What is its mass number?
An atom has 4 protons, 5 neutrons, and 4 electrons. What is its mass number?
What is the mass number of an atom that has 8 protons, 8 neutrons, and 8 electrons?
The K, L, M, N shells correspond to the principal quantum numbers...
In the standard notation for an element, the number 17 in ³⁵₁₇Cl represents the:
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