Q: A photon has a wavelength of $$4.0 \times 10$$^{-7}$$ m. What is its energy? (Use h = 6.626$$ \times $$10^{-34}$$\ \text{J} \cdot \text{s}$$ and c = 3.00$$ \times $$10^8$$\ \text{m/s}$$)

$$4.97 \times 10$$^{-19}$$\ \text{J}$$

Q: What is the frequency ($$\nu) of $$light with a wavelength ($$\lambda) of$$ $$6.0 \times 10$$^{-7}$$ m? (Speed of light c = 3.00$$ \times $$10^8 m/s)$$

$$5.0 \times 10$$^{14}$$\ \text{Hz}$$

Question 1

Which of the following correctly expresses 0.00052 in scientific notation?

Accepted Answer

$$5.2 	imes 10$$^{-4}$$

Question 2

A student measures the mass of a liquid as 12.30 g and its volume as 4.1 mL. What is the density of the liquid, reported to the correct number of significant figures?

Accepted Answer

$$3.0\ 	ext{g/mL}$$

Question 3

Convert 0.0035 kilometers to centimeters using the appropriate conversion factors.

Accepted Answer

$$350\ 	ext{cm}$$

Question 4

Which of the following statements best describes the difference between precision and accuracy?

Accepted Answer

Precision refers to how close measurements are to each other, while accuracy refers to how close measurements are to the true value.

Question 5

A sample contains $$2.5 	imes 10$$^{24}$$ molecules. How many moles of molecules are present?

Accepted Answer

$$4.15\ 	ext{mol}$$

Question 6

Which law states that the total mass of reactants equals the total mass of products in a chemical reaction?

Accepted Answer

Law of conservation of mass

Question 7

What is the atomic number of an element with 17 protons, 18 neutrons, and 17 electrons?

Accepted Answer

17

Question 8

Which of the following is a heterogeneous mixture?

Accepted Answer

Wet sand

Question 9

What is the correct electron configuration for a neutral carbon atom?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^2$$

Question 10

Which quantum number determines the energy level of an electron in an atom?

Accepted Answer

Principal quantum number ($$n)$$

Question 11

A photon has a wavelength of $$4.0 	imes 10$$^{-7}$$ m. What is its energy? (Use h = 6.626$$ 	imes $$10^{-34}$$\ 	ext{J} \cdot 	ext{s}$$ and c = 3.00$$ 	imes $$10^8$$\ 	ext{m/s}$$)

Accepted Answer

$$4.97 	imes 10$$^{-19}$$\ 	ext{J}$$

Question 12

Which element is most likely to form a $$2+$$ ion based on its position in the periodic table?

Accepted Answer

Mg

Question 13

Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

Accepted Answer

Pauli exclusion principle

Question 14

Which of the following elements has the highest first ionization energy?

Accepted Answer

Ne

Question 15

What is the frequency ($$
u) of $$light with a wavelength ($$\lambda) of$$ $$6.0 	imes 10$$^{-7}$$ m? (Speed of light c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$5.0 	imes 10$$^{14}$$\ 	ext{Hz}$$

Question 16

Which orbital is filled first according to the Aufbau principle?

Accepted Answer

1s

Question 17

Which of the following is a qualitative measurement?

Accepted Answer

The solution is blue.

Question 18

Which element has the greatest metallic character?

Accepted Answer

Cs

Question 19

A student needs to convert 25°C to Kelvin. What is the correct value?

Accepted Answer

$$298\ 	ext{K}$$

General Chemistry Study Guide: Atoms, Measurement, Quantum Mechanics, and Periodic Properties

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