Question 1

Which of the following best describes the relationship between matter, chemical elements, and atoms as depicted in the first image?

Accepted Answer

Matter is composed of chemical elements, which are made up of atoms.

Question 2

Based on the second image, which statement is correct regarding the composition of a diamond and a honey bee?

Accepted Answer

Diamonds are made of carbon, while honey bees contain molecules with carbon, hydrogen, and oxygen.

Question 3

Referencing the third image, which subatomic particle has no electric charge and is found in the nucleus?

Accepted Answer

Neutron

Question 4

According to the fourth image, which subatomic particle is negatively charged and orbits the nucleus?

Accepted Answer

Electron

Question 5

Based on the periodic table in the fifth image, which elements are considered trace elements?

Accepted Answer

Elements highlighted in blue

Question 6

Using the sixth image, what is the atomic number of carbon and what does it represent?

Accepted Answer

6; the number of protons

Question 7

Refer to the seventh image. How many electrons are found in the outermost shell of a nitrogen atom?

Accepted Answer

5

Question 8

The eighth image illustrates the octet rule. What does this rule state about atomic stability?

Accepted Answer

Atoms are more stable when their valence shell is fully occupied, usually with 8 electrons.

Question 9

Based on the ninth image, why is neon (Ne) chemically unreactive?

Accepted Answer

Its valence shell is full with 8 electrons.

Question 10

Referencing the tenth image, how many protons does an oxygen atom have?

Accepted Answer

8

Question 11

Using the eleventh image, what is the main difference between the three isotopes of carbon?

Accepted Answer

They have different numbers of neutrons.

Question 12

Based on the twelfth image, what is released when a radioactive atom decays?

Accepted Answer

Energy and particles

Question 13

The thirteenth image shows two applications of radioactive isotopes. Which of the following is a correct use?

Accepted Answer

Dating fossils using radiometric methods

Question 14

According to the fourteenth image, what does the chemical formula C$$_6H$_{12}O$_6$$ represent?

Accepted Answer

A compound with 6 carbon, 12 hydrogen, and 6 oxygen atoms

Question 15

The fifteenth image distinguishes between intramolecular and intermolecular bonds. Which statement is correct?

Accepted Answer

Intermolecular bonds occur between different molecules.

Question 16

Based on the sixteenth image, what type of bond is shown between the two HF molecules?

Accepted Answer

Intermolecular hydrogen bond

Question 17

Referencing the seventeenth image, what do the δ+ and δ− symbols represent in the context of polar molecules?

Accepted Answer

Partial positive and partial negative charges due to unequal electron sharing

Question 18

According to the eighteenth image, which of the following is NOT a type of covalent bond?

Accepted Answer

Van der Waals interaction

Question 19

Based on the nineteenth image, what happens to a hydrogen atom when it loses an electron?

Accepted Answer

It becomes a positively charged ion (cation)

Question 20

Referencing the twentieth image, what is the result of the transfer of an electron from sodium to chlorine?

Accepted Answer

Sodium becomes a cation and chlorine becomes an anion, forming NaCl

The Chemistry of Life: Atoms, Elements, and Chemical Bonds

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