Question

*Update*
*CHEMISTRY ASSIGNMENT*

*SUBMIT tomorrow 12pm* 

1  write out the meaning of the following, with examples.

A)  valency

B)  Atomic number

C)  Mass number

D)  Isotopy (list 2 Elements that exibit isotopy)

2    Write out the electron configuration of the following according to the KLMN shell

A)   sodium Na

B)   Aluminium ion Al^-3

C)   chlorine ion Cl^-

D)   Sulphur

3A)  Sodium Na, atomic number11, has a mass number of 23.How many protons does it have.

3B)  Neon atom has atomic number of 10 and mass number 20. Find the number of electrons.

3C)  A clorine ion has mass number 37. Find the number of electrons if it has 20 nuetrons.​

Answer 1

Answer:

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Explanation:

please

Answer 2

Valency - The combining capacity of an element. Atomic number - The number of atoms present in an atom. Mass number- The sum of protons and neutrons present in the nucleus of an atom. Isotope year- A homotopy from one embedding of a manifold in. to another such that at every time, it is an embedding. The notion of isotopy is category independent, so notions of topological, piecewise-linear, smooth, isotopy (and so on) exist. When no explicit mention is made, "isotopy" usually means "smooth isotopy." Two elements that exhibit isotophy carbon and chlorine. (3). Sodium - 11. Neon - 10 Hope this helps. I don’t know the other ones