Question

Ядро атома некоторого элемента содержит 20 нейтронов, а число электронов в атоме равно 17. Определите его массовое число 37 получить?

Answer 1

Ответ:

Количество электронов в атоме равно количеству протонов и заряду ядра атома, а также атомному номеру химического элемента. Это хлор. Заряд ядра его атома +17, массовое число(А) = Z (количество протонов) + n (количество нейтронов); А = 20 +17=37 Заряд ядра атома хлора +17, массовое число 37.

Answer 2

Determining the Mass Number of an Atom

To determine the mass number of an atom, we need to know the number of protons and neutrons in its nucleus. The mass number is the sum of these two values.

In this case, we are given that the atom contains 20 neutrons and the number of electrons is 17. However, we need to know the number of protons to calculate the mass number.

The number of protons in an atom is equal to its atomic number. Unfortunately, the atomic number is not provided in the question. To proceed, we will need to make an assumption about the element in question.

Assuming that the atom in question is electrically neutral (meaning it has an equal number of protons and electrons), we can determine the atomic number by subtracting the number of electrons from the total number of particles in the atom (which is the sum of protons and neutrons).

Let's calculate the atomic number first:

Total number of particles = Number of protons + Number of neutrons Total number of particles = 20 neutrons + 17 electrons

Since the atom is electrically neutral, the total number of particles is equal to the number of protons. Therefore, the atomic number is:

Atomic number = Total number of particles - Number of electrons Atomic number = (20 neutrons + 17 electrons) - 17 electrons Atomic number = 20 neutrons

Now that we have the atomic number, we can calculate the mass number:

Mass number = Atomic number + Number of neutrons Mass number = 20 neutrons + 20 neutrons Mass number = 40

Therefore, the mass number of the atom in question is 40.

Please note that this calculation assumes the atom is electrically neutral. If the atom is not neutral, the number of protons would be different, and the mass number would also change accordingly.

I hope this helps! Let me know if you have any further questions.