Q: The calculated diameter of a carbon atom is $0.000000000340\ \mathrm{m}$. In correct scientific notation, this is equal to ________.

$3.40 \times 10^{-10}\ \mathrm{m}$

Q: The atomic radius of a uranium atom is approximately $175\ \mathrm{pm}$. In correct scientific notation, this is ________.

$1.75 \times 10^{-10}\ \mathrm{m}$

Q: What is the frequency (in hertz) of the photons emitted by a HeNe laser with a wavelength of $632.8\ \mathrm{nm}$?

$4.738 \times 10^{14}\ \mathrm{Hz}$

Q: What is the energy $(E,\ \mathrm{in\ joules})$ of the $514.5\ \mathrm{nm}$ photons emitted by an argon-ion laser?

$3.86 \times 10^{-19}\ \mathrm{J}$

Question 1

Which of the following is an example of a quantitative observation?

Accepted Answer

The temperature of the liquid is $65^\circ \mathrm{C}$.

Question 2

The following measurements of the mass of an aspirin tablet were made by different students in a lab. Which set is the most precise?

Accepted Answer

$1.513\ \mathrm{g},\ 1.517\ \mathrm{g},\ 1.512\ \mathrm{g}$

Question 3

The calculated diameter of a carbon atom is $0.000000000340\ \mathrm{m}$. In correct scientific notation, this is equal to ________.

Accepted Answer

$3.40 	imes 10^{-10}\ \mathrm{m}$

Question 4

The deepest point in the Mariana Trench is approximately $10.9\ \mathrm{km}$. What is this depth in feet? $(1\ \mathrm{m} = 3.2808\ \mathrm{ft})$

Accepted Answer

$57,000\ \mathrm{ft}$

Question 5

On July 10, 1913, the world-record highest air temperature was recorded to be $134^\circ \mathrm{F}$ at Furnace Creek Ranch in Death Valley, California. What is this temperature in degrees Celsius?

Accepted Answer

$57^\circ \mathrm{C}$

Question 6

Which one of the following represents a chemical change?

Accepted Answer

Mercury(II) oxide is heated up and forms mercury metal and oxygen gas.

Question 7

The atomic radius of a uranium atom is approximately $175\ \mathrm{pm}$. In correct scientific notation, this is ________.

Accepted Answer

$1.75 	imes 10^{-10}\ \mathrm{m}$

Question 8

In any neutral atom, ________.

Accepted Answer

the number of electrons equals the number of protons.

Question 9

What value should be reported for the total mass of three samples of iron weighing $117.0\ \mathrm{g}$, $19.43\ \mathrm{g}$, and $6.1043\ \mathrm{g}$?

Accepted Answer

$142.5\ \mathrm{g}$

Question 10

All of the following are true EXCEPT:

Accepted Answer

Ions are formed by changing the number of protons in an atom's nucleus.

Question 11

A $^{37}\mathrm{Cl}$ atom has ________ protons, ________ neutrons, and ________ electrons.

Accepted Answer

17; 18; 17

Question 12

A strontium-90 atom that has lost 2 electrons has ________ protons, ________ neutrons, and ________ electrons.

Accepted Answer

38; 52; 36

Question 13

Elements in group 17 (VIIA) are called ________.

Accepted Answer

halogens

Question 14

What is the frequency (in hertz) of the photons emitted by a HeNe laser with a wavelength of $632.8\ \mathrm{nm}$?

Accepted Answer

$4.738 	imes 10^{14}\ \mathrm{Hz}$

Question 15

What is the energy $(E,\ \mathrm{in\ joules})$ of the $514.5\ \mathrm{nm}$ photons emitted by an argon-ion laser?

Accepted Answer

$3.86 	imes 10^{-19}\ \mathrm{J}$

Question 16

Determine the wavelength of the line in the hydrogen atomic emission spectrum corresponding to the $n_{	ext{initial}} = 4$ to $n_{	ext{final}} = 3$ transition.

Accepted Answer

$1875\ \mathrm{nm}$

Question 17

How many orbitals are possible for the $n = 3$ shell?

Accepted Answer

9

Question 18

Which subshell has only five orbitals?

Accepted Answer

$l = 2$

Question 19

What are the principal and angular momentum quantum numbers for a $4f$ orbital?

Accepted Answer

$n = 4,\ l = 3$

Question 20

What is the orbital designation for an electron with the quantum numbers $n = 3$, $l = 2$?

Accepted Answer

$3d$

General Chemistry: Foundational Concepts and Atomic Structure Study Guide

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