Question

Помогите пж с Химией: Определите химический элемент по известному массовому числу и числу нейтронов. 1) Массовоечисло – 3, число нейтронов– 2, химический знак элемента – 2) Массовоечисло – 3, числонейтронов – 2, химический знакэлемента – 3) Массовоечисло – 3, числонейтронов – 2, химический знакэлемент – 4) Массовоечисло – 3, числонейтронов – 2, химический знакэлемента –​H, O, C, Ca

Answer 1

° Ответ:

1) H (мас.число 1; нейтронов 0);

2) O (мас.число 16; нейтронов 8);

3) C (мас.число 12; нейтронов 6);

4) Ca (мас.число 40; нейтронов 20).

° Объяснение:

~ массовое число (A) = относит.атом.масса хим.эл.;

~ Z - число протонов( p(+) ) = заряду атома (порядковому номеру хим.эл.);

~ N - число нейтронов( n(0) ) = A - Z.

Answer 2

Determining the Chemical Element

To determine the chemical element based on the known atomic mass number and the number of neutrons, we need to understand the relationship between these values and the properties of elements.

The atomic mass number (also known as the mass number) represents the total number of protons and neutrons in an atom's nucleus. The chemical symbol represents the element. Neutrons are electrically neutral particles found in the nucleus of an atom.

Now, let's analyze each given set of information to determine the corresponding chemical element:

1) Mass number = 3, Number of neutrons = 2, Chemical symbol = ?

To find the number of protons, we subtract the number of neutrons from the mass number. In this case, the number of protons would be 3 - 2 = 1.

To determine the chemical symbol, we can refer to the periodic table, where the element with 1 proton is hydrogen (H) [[1]].

Therefore, the chemical symbol for the element with a mass number of 3 and 2 neutrons is H (hydrogen).

2) Mass number = 3, Number of neutrons = 2, Chemical symbol = ?

Using the same approach as before, we find that the number of protons is 3 - 2 = 1.

Referring to the periodic table, we see that hydrogen (H) is the element with 1 proton [[1]].

Therefore, the chemical symbol for the element with a mass number of 3 and 2 neutrons is H (hydrogen).

3) Mass number = 3, Number of neutrons = 2, Chemical symbol = ?

Again, the number of protons is 3 - 2 = 1.

Based on the periodic table, hydrogen (H) is the element with 1 proton [[1]].

Therefore, the chemical symbol for the element with a mass number of 3 and 2 neutrons is H (hydrogen).

4) Mass number = 3, Number of neutrons = 2, Chemical symbol = ?

Once more, the number of protons is 3 - 2 = 1.

According to the periodic table, hydrogen (H) is the element with 1 proton [[1]].

Therefore, the chemical symbol for the element with a mass number of 3 and 2 neutrons is H (hydrogen).

In summary, for all the given sets of information, the chemical symbol for the element with a mass number of 3 and 2 neutrons is H (hydrogen).

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