which of these statements is true about an atom of chromium? (A) has more protons then electrons. (B) has fewer parts than an atom of iron. (C) has an atomic number of 51.996. (D) has more electrons than neutrons.

I think it is c

51.996 is the atomic mass of chronium, I don not know if it is the same for atomic number of chromium

To determine which statement is true about an atom of chromium, let's go through each option:

(A) Has more protons than electrons: An atom is neutral, meaning that the number of protons (positively charged particles) is equal to the number of electrons (negatively charged particles) in order to balance the charges. Chromium (Cr) has an atomic number of 24, which means it has 24 protons. So, it also has 24 electrons. Therefore, statement (A) is false.

(B) Has fewer parts than an atom of iron: An atom is the smallest unit of matter that retains the properties of an element. Both chromium and iron are elements, and an atom of each element contains the same number of subatomic particles, including protons, electrons, and neutrons. Therefore, statement (B) is false.

(C) Has an atomic number of 51.996: The atomic number of an element corresponds to the number of protons in its nucleus. The atomic number of chromium is 24, not 51.996. Therefore, statement (C) is false.

(D) Has more electrons than neutrons: To determine if this statement is true, we need to know the number of electrons and neutrons in a chromium atom. The number of electrons in an atom is equal to the number of protons, which is 24 for chromium. However, we also need to know the number of neutrons. The atomic mass of chromium is approximately 51.996, and since the atomic number (protons) is 24, we can subtract the atomic number from the atomic mass to find the number of neutrons. 51.996 - 24 = 27.996, which is approximately 28. So, an atom of chromium has 24 electrons and 28 neutrons. Since the number of electrons is less than the number of neutrons, statement (D) is false.

In conclusion, none of the statements are true about an atom of chromium.