Question

An atom or ion has 42 neutrons , 36 protons, and 36 electrons. Identify the element symbol, and determine the mass number and charge for this atom or ion.

Answer 1

Answer:

i hope this will help you :)

Explanation:

number of electrons=36

number of protons=36

number of neutrons=42

mass number=number of protons+number of neutrons

mass number=36+42

mass number=78

so the element will be krypton Kr

as elements are identified on their number of electrons so this atom is krypton

as the actual atomic mass of krypton is 86 here the calculated atomic mass is 78 so krypton has loss 8 electrons but this must require a great amount of energy so the charge on krypton is +8

Answer 2

The symbol for this element is Kr, because that element is Krypton.

It is possible to find this out by the atomic number of the element. This atomic number is equal to the number of protons in the element.

Therefore, you should look, in a periodic table, which element has the atomic number equal to 36. In this search, you will see that this element is Krypton.

To know the mass and electrical charge, follow these steps:

• The element's mass is calculated as the sum of the number of protons and the number of neutrons.
• Thus, the mass of this element is calculated through 36+42 which results in 78u.
• The electric charge, refers to the amount of electrons in the valence layer of the atom.
• Atoms with more than 8 electrons in the valence layer have a positive electric charge and atoms with less than 8 electrons in the valence layer have a negative electric charge.

• Krypton has 8 electrons in the valence layer, which means this is a neutral element.

Krypton is a noble gas, and electric stability is normal among these gases. With that, we can conclude that Krypton is an atom and not an ion.

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https://brainly.com/question/1994755?referrer=searchResults