Question 1

Which subatomic particle has the smallest mass and volume?

Accepted Answer

Electrons have the smallest mass and volume among the options listed. Neutrons and protons have significantly more mass, and the nucleus consists of protons and neutrons, making it much larger in mass and volume compared to an electron.

Question 2

Which scientist was responsible for the discovery of the nucleus?

Accepted Answer

Ernest Rutherford is credited with the discovery of the nucleus through his gold foil experiment, which demonstrated that atoms have a small, dense, positively charged center.

Question 3

Argon has three isotopes: Argon-36, Argon-38, and Argon-40. Which of these isotopes has the highest natural abundance?

Accepted Answer

Argon-40 is the most abundant isotope of argon in the Earth's atmosphere, making up about 99.6% of the natural argon.

Question 4

Which two Greek philosophers had conflicting thoughts on the nature of the atom?

Accepted Answer

Aristotle and Democritus had conflicting views on the nature of the atom. Democritus is known for his atomic theory, suggesting that everything is composed of atoms, which are indivisible and indestructible. Aristotle, on the other hand, did not believe in the existence of atoms and proposed that matter was continuous.

Question 5

The abbreviated electron configuration for Cs is _____________________.

Accepted Answer

The answer of The abbreviated electron configuration for Cs is...

Question 6

Chromium has four isotopes as shown in the table.
  Calculate the atomic mass of chromium. Include all digits in your answer.

Accepted Answer

The answer of Chromium has four isotopes as shown in...

Question 7

Calculate the energy emitted from a potassium atom as it releases a photon of light with a frequency of 5.99 × 10¹⁵ Hz.

Accepted Answer

The answer of Calculate the energy emitted from a potassium...

Question 8

Explain the difference between the law of conservation of mass and the law of definite proportions.

Accepted Answer

The answer of Explain the difference between the law of...

Question 9

Which of the following statements is NOT a part of Dalton's atomic theory?

Accepted Answer

Dalton's atomic theory did not include the concept of subatomic particles like protons, neutrons, and electrons. This detail was discovered later in the development of atomic theory.

Question 10

Neon has three isotopes as shown in the table.
  Calculate the atomic mass of neon. Include all digits in your answer.

Accepted Answer

The answer of Neon has three isotopes as shown in...

Question 11

The full electronic configuration for Br is _____.

Accepted Answer

The answer of The full electronic configuration for Br is...

Question 12

Which of the following configurations is the electron configuration for Cr?

Accepted Answer

Chromium (Cr) has an electron configuration of [Ar]4s¹3d⁵ due to the stability provided by a half-filled d subshell.

Question 13

Which type of spectrum is produced when light is passed through a prism?

Accepted Answer

When light is passed through a prism, it disperses into a continuous spectrum, showing all the colors from violet to red without any gaps, similar to a rainbow.

Question 14

Explain how a line spectrum is made.

Accepted Answer

The answer of Explain how a line spectrum is made....

Question 15

The full electronic configuration for Ca is _____.

Accepted Answer

The answer of The full electronic configuration for Ca is...

Question 16

Lanthanum has two isotopes: La-138 and La-139. Which of these isotopes has the highest natural abundance?

Accepted Answer

La-139 has the highest natural abundance among the isotopes of lanthanum, making up approximately 99.91% of natural lanthanum.

Question 17

Calculate the energy emitted from a neon atom as it releases a photon of light with a wavelength of 9.582 nm.

Accepted Answer

The answer of Calculate the energy emitted from a neon...

Question 18

How many protons are there in In-113?

Accepted Answer

The atomic number of Indium (In) is 49, which is equal to the number of protons in its nucleus.

Question 19

The abbreviated electron configuration for xenon is _________________.

Accepted Answer

The answer of The abbreviated electron configuration for xenon is...

Quiz 3: Atomic Clues