# Atomic Theory Exam Review Questions

## Quiz by Darrien James

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10 questions
• Q1

What is the electron configuration of  Calcium?

1s22s22p63s23p64s1

1s22s22p63s23p5

1s22s22p63s23p64s2

1s22s22p63s23p6

30s
• Q2

What is the electron configuration of N3- ?

1s22s22p4

1s22s22p5

1s22s22p63s23p6

1s22s22p6

30s
• Q3

Which of the following models would represent  very reactive metals?

Model  3 only

Model 2 and 3

Model  2 only

Model 1 and 2

30s
• Q4

Which of the following is the most abundant isotope of carbon: 12C,13C, 14C? Explain.

13C is the most abundant isotope of carbon because its mass number is closest to the average atomic mass of carbon.

13C is the most abundant isotope of carbon because its atomic number is closest to the average atomic mass of carbon.

12C is the most abundant isotope of carbon because its mass number is closest to the average atomic mass of carbon.

12C is the most abundant isotope of carbon because its atomic number is closest to the average atomic mass of carbon.

30s
• Q5

Four students were provided with Gallium's isotopic data in the following table (view image):

The students were asked to calculate the average atomic mass of Gallium. Which option represents the correct student's calculation?

(60.11/100)*(68.9256)   +   (39.89/100)*(70.9247)

(60.11*100)/(68.9256)   +  (39.89*100)/(70.9247)

(60.11)(68.9256) + (39.89)(70.9247)

(60.11)+(68.9256) +(39.89)+(70.9247)

30s
• Q6

How many protons, neutrons and electrons are there in the following phosphorus anion?

15 protons, 16 neutrons, 18 electrons

15 protons, 16 neutrons, 15 electrons

16 protons, 15 neutrons, 18 electrons

15 protons, 15 neutrons, 18 electrons

30s
• Q7

How many protons, neutrons and electrons are there in the following lead cation?

82 protons, 124 neutrons, 86 electrons

124 protons, 82 neutrons, 78 electrons

82 protons, 82 neutrons, 78 electrons

82 protons, 124 neutrons, 78 electrons

30s
• Q8

When is light emitted during a flame test?

Light is emitted when the proton returns to the ground state from the excited.

Light is emitted when the atom is heated and the energy is used to move the electron to the excited state.

Light is emitted when the atom is heated and the energy is used to move the neutron to the excited state.

Light is emitted when the electron returns to the ground state from the excited.

30s
• Q9

Examine the attached image, which of the following is supporting evidence that a new element is produced?

The newly produced atom has a different number of neutrons.

The newly produced atom has a different number of electrons.

All 3 atoms have the same number of protons

The newly produced atom has a different number of protons.

30s
• Q10

Which of the following is the electron configuration of a non reactive  element?

1s22s22p63s23p6

1s22s22p63s23p64s2

1s22s22p63s23p64s1

1s22s22p63s23p5

30s

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