Question

Hey guys please answer fast plzzzzz​

Answer 1

Answer:

Heya✌️♥️☺️

Explanation:

• ✏️Same atomic number but different mass number.

• ✏️Zero(0) and one(1)

❗Valency of Ne is zero as it is a noble gas and thus does not take part in bond formation. Cl has electronic configuration: 2,8,7. Therefore, Cl will accept one electron to attain stable noble gas configuration. Thus valency of Cl is 1.

• ✏️silicon-Atomic number=14; so, electronic configuration=2,8,4

• Sulphur-At.no=16,so electronic configuration=2,8,6

• ✏️Valency will be one(1).The element could be lithium.

❗The outermost orbit of Lithium has 1 Electron so it's valency could be +1 or -1

✒️Hope it helps☺️♥️✌️...

Answer 2

Answer:

helllo !!!!!!(◍•ᴗ•◍)

Explanation:

• same atomic number different mass number

• neon(☞ 0 and chlorine (☞ 1

• 1s²2s²2p63s² 3p⁴...silicon

1s²2s²2p63s²3p6.....sulphur

• 3 protons -- LITHIUM and hence the valency is 1

hope it helps ( ◜‿◝ )