Question

Вычислить количество протонов,электронов, нейтронов в атомах магния,хрома

Answer 1

магний 12 протонов,12 нейтронов,3 электронных уровня
хром 24 протонов нейтронов 28, 3 электронных уровня (вроде 3) :))

Answer 2

Magnesium (Mg)

To calculate the number of protons, electrons, and neutrons in an atom of magnesium (Mg), we need to look at its atomic number and atomic mass.

The atomic number of magnesium is 12, which means it has 12 protons. Protons are positively charged particles found in the nucleus of an atom.

The atomic mass of magnesium is approximately 24.31 atomic mass units (AMU). The atomic mass represents the average mass of all the isotopes of an element. Since the atomic mass is not a whole number, it indicates that magnesium has isotopes with different numbers of neutrons.

To calculate the number of neutrons, we subtract the number of protons from the atomic mass. In this case, the number of neutrons in magnesium can be calculated as:

Number of neutrons = Atomic mass - Atomic number = 24.31 AMU - 12 = 12.31 neutrons

Since atoms are electrically neutral, the number of electrons in an atom is equal to the number of protons. Therefore, magnesium also has 12 electrons.

In summary, an atom of magnesium (Mg) has: - Protons: 12 - Electrons: 12 - Neutrons: 12.31 (approximately)

Chromium (Cr)

To calculate the number of protons, electrons, and neutrons in an atom of chromium (Cr), we need to look at its atomic number and atomic mass.

The atomic number of chromium is 24, which means it has 24 protons.

The atomic mass of chromium is approximately 51.996 atomic mass units (AMU). Similar to magnesium, chromium also has isotopes with different numbers of neutrons.

To calculate the number of neutrons, we subtract the number of protons from the atomic mass. In this case, the number of neutrons in chromium can be calculated as:

Number of neutrons = Atomic mass - Atomic number = 51.996 AMU - 24 = 27.996 neutrons

Since atoms are electrically neutral, the number of electrons in an atom is equal to the number of protons. Therefore, chromium also has 24 electrons.

In summary, an atom of chromium (Cr) has: - Protons: 24 - Electrons: 24 - Neutrons: 27.996 (approximately) Please note that the number of neutrons provided for both magnesium and chromium is an approximation, as the atomic mass is not a whole number and indicates the presence of isotopes with different numbers of neutrons.