Section 4.2 The Structure of an Atom-Physical Science Questions and Answers 2024

Section 4.2 The Structure of an Atom-
Physical Science

1. What are 3 subatomic particles? - answer a. Protons
b. Electrons
c. Neutrons

2. Circle the letter that identifies a subatomic particle with a positive (+) charge. -
answerb. Proton

3. Why did Chadwick conclude that the particles produced by his experiment were
neutral in charge? - answerA charged object did not deflect their path

4. Circle the letters of properties that vary among subatomic particles. - answera. Color
c. Charge
d. Location in the Atom

5. Circle the letter of the expression that accurately compares the masses of neutrons
and protons. - answera. Mass of 1 neutron=mass of 1 proton

6. Two atoms of the same element can have different numbers of protons. - answerTrue

7. What is an atomic number? - answerThe number of protons in an atom

8. Circle the letters that identify quantities that are always equal to an element's atomic
number. - answerb. Number of Protons
c. Number of Neutrons
d. Number of Electrons

9. Two different elements can have the same atomic number. - answerTrue

10. What is the mass number of an atom? - answerThe sum of the protons and
neutrons in an atom
(# of protons + # of neutrons)

11. Complete the equation... - answer# of neutrons=mass # - atomic # (# of protons)

12. Every atom of a given element has the same number of ____________ and
____________. - answerProtons and Electrons