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ivann1987 [24]
4 years ago
6

He image shows the representation of an unknown element in the periodic table.

Chemistry
2 answers:
alexandr402 [8]4 years ago
8 0

Answer:

the number of neutrons in an atom of the element is 10.

Explanation:

neutron: mass # -protons

neutron: 19 (18.9984 (rounded)) - 9

neutron: 19- 9 =10

whole number is equal to the number of protons.

bekas [8.4K]4 years ago
3 0

Answer: Option (b) is the correct answer.

Explanation:

Atomic number is the sum of total number of protons present in an atom. And, atomic mass is the sum of total number of protons and neutrons present in an element.

Also, in a neutral atom the number of protons equal to the number of electrons.

Generally, atomic number is written on the top right corner of the symbol of an element and atomic mass is written at the bottom.

So here, number 9 is the atomic number and its atomic mass will be approximately 19.

Therefore, number of neutrons present in the given element will be as follows.

                    Atomic mass = no. of protons + no. of neutrons

                              19 = 9 + no. of neutrons

                        no. of neutrons = 19 - 9

                                                 = 10

Thus, we can conclude that the statement number of neutrons in an atom of the element is 10, is true.

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Scientists are studying animals in a large lake area. In this lake area, both owls and raccoons eat ducks, and ducks eat frogs.
Stolb23 [73]

Answer:

Population of duck and frog will change with the change

Explanation:

The complete question is

Scientists are studying animals in a large lake area. In this lake area, both owls and raccoons eat ducks, and ducks eat frogs. The data shows that recently the size of the raccoon population decreased. How will the decrease in the raccoon population affect the other populations? Be sure to explain whether the owl population, the duck population, and the frog population will change, and why.

  1. Owl population will change
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  3. Frog population will change

Solution

Raccoon eat duck and duck eat frog. Now if the population of Raccoon decreases then the number of predators of duck will decrease thereby increasing the population of duck.

The higher will be the number of ducks, the more frogs they will consume thereby decreasing the population of frogs

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IgorLugansk [536]
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VashaNatasha [74]

Answer:

C.  the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance

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Romashka-Z-Leto [24]

Answer:

zince chloride will be formed and hydrogen gas will be librated.

Explanation:

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3 years ago
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