INV 2 Atomic Structure Review

The image shows a model for a lithium atom: How many neutrons are in this lithium atom?

• 3
• 4
• 7
• 10

How many electrons does one neutrally charged atom of argon have?

• 18
• 22
• 40
• 58

How many neutrons are there in Ra-226?

• 88
• 138
• 226
• 314

The table shows the number of each of the three subatomic particles for four atoms. Which atoms represent the same element?

• 1 and 2
• 2 and 3
• 1 and 3
• 2 and 4

What is the lowest possible energy level that an electron can occupy?

• excited state
• fundamental state
• ground state
• outermost state

How many electrons are located in the outermost orbit in the Bohr model of a boron atom?

• 1
• 2
• 3
• 4

The figure shows different possible transitions of electrons as they move from higher energy states to lower energy states. Which transition will produce the spectrum line with the lowest wavelength in this element’s atomic spectrum?

• A
• B
• C
• D

Which statement best describes the location of an electron with the lowest possible energy, according to Bohr’s atomic model?

• It occupies the nucleus.
• It occupies the innermost orbit.
• It occupies the outermost orbit.
• It occupies an orbit between the innermost and outermost orbits.

Read the passage and use the diagram to answer the next question. Oxygen is perhaps the most important atom on Earth. It is responsible for life as we know it, and it is the most abundant atom on our planet. There are more oxygen atoms on Earth than all the other elements’ atoms combined. It was discovered as an atom by Antoine Lavoisier in 1777. The image shows the Bohr atom model for Oxygen. Which of the following electronic transitions in the oxygen atom will result in light emission?

• n = 1 ⟶ n = 2
• n = 1 ⟶ n = 3
• n = 3 ⟶ n = 2
• n = 2 ⟶ n = 3

Read the passage and use the diagram to answer the next one question. Silicon is the second most abundant element in Earth’s crust. It is used in the electronics industry to manufacture transistors, and in the construction industry to produce concrete and Portland cement. The following graph shows the relative abundances of the naturally occurring silicon isotopes. What could be the estimated atomic mass of Silicon?

• 26.2 amu
• 28.1 amu
• 29.8 amu
• 30.1 amu