Question

multiple response
identify one or more choices that best complete the statement or answer the question.

____ 92. which statement is correct for the symbol (_6^{14}\text{c})?
a. it represents the isotope of carbon with 6 neutrons.
b. it represents the isotope of carbon with a mass number of 14 amu.
c. it represents the isotope of carbon which contains 6 protons.
d. it represents the isotope of carbon with 14 neutrons.

matching

match the following scientists to their major contribution to science.
a. bohr d. chadwick
b. rutherford e. thomson
c. dalton

____ 93. alpha particles were used to discover the nucleus.
____ 94. electrons travel around the nucleus in circular orbits.
____ 95. negatively charged electrons are embedded in a positive
sphere.
____ 96. atoms are indivisible and indestructible.

Explanation:

---

Question 92

Step1: Recall nuclide notation rules

For $_Z^A X$, $Z$ = atomic number (protons), $A$=mass number, neutrons = $A-Z$. For $_6^{14}\text{C}$, $Z=6$, $A=14$, neutrons = $14-6=8$.

Step2: Evaluate each option

a. 6 neutrons is wrong, neutrons=8.
b. Mass number 14 amu is correct.
c. 6 protons matches $Z=6$, correct.
d. 14 neutrons is wrong.
---

Questions 93-96

1. Rutherford used alpha particles in gold foil experiment to discover the nucleus.
2. Bohr proposed electrons orbit nucleus in fixed circular orbits.
3. Thomson created the plum pudding model (electrons in positive sphere).
4. Dalton's atomic theory stated atoms are indivisible/indestructible.

---

Answer:

s:

1. b. It represents the isotope of carbon with a mass number of 14 amu.

c. It represents the isotope of carbon which contains 6 protons.

1. b. Rutherford
2. a. Bohr
3. e. Thomson
4. c. Dalton