Question

required information
study the concept map below and then answer the questions that follow.

consist of
particles called

atoms
join by

chemical bonds
to form

molecules
includes

water
molecules stick
together because of

hydrogen bonds

organic
molecules
include

carbohydrates
proteins
nucleic acids
lipids

which of the following statements are true?

check all that apply

all isotopes of carbon (c) have the same number of protons.

an atom with no protons in its nucleus will always have no neutrons in its nucleus.

an atom with a neutral charge has an equal number of protons and electrons.

the atomic number is the total number of electrons and protons in an atom.

Explanation:

To solve this, we analyze each statement:

Statement 1: "All isotopes of Carbon (C) have the same number of protons."

• Isotopes of an element have the same atomic number (number of protons) but different mass numbers (due to different neutrons). Carbon has an atomic number of 6, so all C isotopes have 6 protons. True.

Statement 2: "An atom with 6 protons in its nucleus will always have 6 neutrons in its nucleus."

• Isotopes of carbon (e.g., \( ^{12}\text{C} \), \( ^{13}\text{C} \), \( ^{14}\text{C} \)) have 6 protons but different neutrons (6, 7, 8, respectively). Thus, a C atom with 6 protons can have more/less than 6 neutrons. False.

Statement 3: "An atom with a neutral charge has an equal number of protons and electrons."

• A neutral atom has no net charge. Protons are positive, electrons are negative. Equal numbers of protons and electrons mean their charges cancel. True.

Statement 4: "The atomic number is the total number of electrons and protons in an atom."

• Atomic number is defined as the number of protons (or electrons in a neutral atom). The total of protons + electrons is not the atomic number (e.g., neutral C: 6 protons + 6 electrons = 12, but atomic number is 6). False.

Answer:

The true statements are:

• All isotopes of Carbon (C) have the same number of protons.
• An atom with a neutral charge has an equal number of protons and electrons.

(Check the boxes next to these two statements.)