leslya1455213

13.12.2020 • 

Chemistry

Hello can u answer these quickly? 1- If element X has 6 protons. How many electrons does it have?

2- If element Y has 10 protons. What is its atomic number?

3- If element Z has 15 protons & 17 neutrons. What are its number of electrons, atomic number & mass number?

4- If element A has 7 electrons & 9 neutrons. How many protons does it have? And what is its atomic number?

1- If the atomic number of an element is 15 & its mass number is 31? How many protons & neutrons does this element have?

2- If element B has 9 electrons. Find the number of protons & atomic number.

3- If the mass number of element A is 60 & number of neutrons is 33. Find its number of protons & its atomic number.

Ответ:

Atromity

13.02.2022

Chemistry

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1. 6electrons because in an a neutral atom, the number of electrons and protons are equal

2. Atomic number is 10

3. 15electrons, Atomic number 15,Mass number 32

4. 7protons, Atomic number 7

1. 15protons,16neutrons

2.Number of protons is 9, atomic number is 9

3.Number of protons is 27, Atomic number is 27

Explanation:

The mass number (A)=Atomic/proton number (Z)+Neutron number (N)

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Ответ:

sjsmith21

01.04.2020

Chemistry

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2 and 5

Explanation:

the answer to the second part is 1, 2, and 4

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