Question

2.An element X has the atomic number 20.
i. Name the element X.
ii. What Is its electronic configuration?
iii. What is its mass number?
iv. What is the number of valence electrons in its atom?​

Answer 1

Answer:

gyes please don't put these questions plzzz

plzzz sister / brother.

Answer 2

$\huge\boxed{\mathfrak{\fcolorbox{red}{yellow}{ANSWER}}}$

$\large \:{\sf{i \: .Element \: X \:}} \: = \: {\underline{\sf{\blue{Calcium }}}}$

$\large \:{\sf{ii. \: E.C.}} \: = \: {\underline{\sf{\pink{2 \: ,8, \: 8,2 }}}}$

$\large \:{\sf{iii. \: mass \: no. \: }} \: = \: {\underline{\sf{\orange{40 }}}}$

$\large \:{\sf{iv. \ \: valence \: electron \: }} \: = \: {\underline{\sf{\green{2 }}}}$