Protons, neutrons, electrons
Before you read
Test yourself first: 5 questions
Question 1 of 5
The atomic number of an element is equal to its number of:
Answer: B. The atomic number equals the number of protons, which defines the element. Protons + neutrons give the mass number.
Question 2 of 5
The number of protons in an atom of carbon (atomic number 6) is:
Answer: B. The atomic number equals the number of protons, so carbon has 6 protons.
Question 3 of 5
Which subatomic particle is located in the nucleus and carries no charge?
Answer: C. Neutrons are neutral particles in the nucleus. Protons are positive (nucleus) and electrons negative (orbit).
Question 4 of 5
The mass number of an atom equals the number of:
Answer: B. Mass number = protons + neutrons. The atomic number counts protons alone.
Question 5 of 5
The collarbone is anatomically called the:
Answer: B. The clavicle is the collarbone, connecting the arm to the trunk.
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